486results about How to "Increase capacity" patented technology

The embodiment of the invention discloses an in-memory computing circuit based on a magnetic cache, and the circuit comprises at least one magnetic cache unit, at least one in-memory computing unit, and a timer. The magnetic cache unit in the at least one magnetic cache unit is used for caching data output by the corresponding in-memory computing unit as to-be-processed data within the corresponding data retention time; the timer is used for respectively setting data retention time for the at least one magnetic cache unit; and the in-memory computing unit in the at least one in-memory computing unit is used for extracting the data to be processed from the corresponding magnetic cache unit for calculation and outputting the computed data to other magnetic cache units. According to the embodiment of the invention, the invention achieves the flexible adjustment of the data retention time of the magnetic cache unit in various in-memory calculation scenes, and achieves the provision of a high-capacity cache for the data needed by in-memory computing under the lower power consumption.

A kind of power device parallel type power module and capacitor charging and discharging method, power module includes two or more than pressure type power device, the two or more than pressure type power device adopts the physical form of half bridge group string upper and lower parallel;The half bridge group string of the pressure type power device is connected in parallel by silicon pile composite busbar;Each power module is provided with pneumatic short-circuit switch, in the case of multiple power module series connection, the pneumatic short-circuit switch is connected in series with all DC capacitors, and charging and discharging is carried out through the ground loop of flexible AC transmission equipment AC, DC valve side;The pneumatic short-circuit switch is connected with gas driving pipeline, and the gas driving pipeline is connected with valve-based gas pressurizing device.The power module can effectively improve the capacity of flexible AC transmission equipment, so that it has short-time frequency modulation capacity output, provides technical scheme support for new power system construction, and guarantees system safety and stability;The provided capacitor charging and discharging method can improve maintenance efficiency and enhance product reliability.

The invention relates to the field of lithium ion batteries, and discloses a lithium titanate composite material and a preparation method thereof, a negative pole piece and a preparation method thereof, a lithium battery and a battery pack. The surfaces of lithium titanate particles are sequentially coated with the nitrogen-doped carbon intermediate layer and the two-dimensional MXene material outer layer, and the MXene material outer layer is formed by bridging adjacent particles through hydrogen bonds, so that a'core-shell-bridge 'three-dimensional conductive network structure is constructed, the electronic conductivity of the lithium titanate composite material is remarkably improved, the electron / ion transmission efficiency of the lithium titanate negative electrode is improved, and the lithium titanate negative electrode has a good application prospect. The lithium ion battery has excellent rate capability and cycle performance; and through collaborative optimization of the three-dimensional composite material and the electrolyte, the interface impedance is reduced, and polarization is inhibited, so that the lithium battery still keeps high capacity and long cycle stability under ultrahigh rate, and meanwhile, the problems of discontinuous conductive network and high interface impedance in the prior art are solved. And excellent rate capability and cycle performance can be achieved under ultrahigh rate.

The invention relates to the field of solid-state batteries, in particular to a halide electrolyte, a preparation method and a solid-state battery. The halide electrolyte comprises a tin element, and the chemical formula of the halide electrolyte is Li2Zr < 1-x > Sn < x > Cl < 6-4x > O < 2x >, and x is less than or equal to 0.3. Through tin-oxygen co-doping, force is exerted at the same time from the two aspects of crystal structure (bulk phase) and interface chemistry, the key problems of ionic conductivity, electrochemical stability, interface compatibility and the like are cooperatively solved, the cost and the process are perfectly considered, and an all-solid-state battery electrolyte solution with a great commercialization prospect is provided.

The invention discloses a 2.4 G-based RSSI (Received Signal Strength Indicator) positioning data relay transmission device and method, and belongs to the technical field of wireless communication. The device comprises a positioning label, a positioning gateway, a relay gateway and a public network gateway. The positioning tag broadcasts a 2.4 G signal containing the ID of the positioning tag; the positioning gateway scans the 2.4 G signal, and generates and broadcasts a data packet in which a positioning gateway address, a data packet number, a relay level and aggregated data are packaged; a relay gateway is switched to a low-power-consumption mode after initialization through a monitoring-learning-synchronization mechanism, wakes up and receives data in a broadcast time window of an upstream gateway of the relay gateway, updates a relay level and forwards the data to a downstream gateway, and therefore multi-hop relay transmission of the data is achieved. And the public network gateway finally uploads the data to a cloud platform or an upper computer. According to the invention, through data aggregation and time synchronization dormancy, the system power consumption is greatly reduced, and long-distance and long-endurance positioning data transmission of battery power supply in a complex environment is realized.

The application relates to an information processing method based on a large language model, a receiving method and related devices thereof, which comprises the following steps: obtaining an initial message to be processed, a target key and a current context; inputting the initial message to be processed into a target large language model, and obtaining a hash value corresponding to a current token in the initial message in a process of generating a token of a target text, and obtaining at least two candidate token sets according to the hash value; determining a target token set from the candidate token set according to the current token, and performing sampling control on candidate tokens in the target token set based on an original probability distribution of the current token to obtain a target token corresponding to a current generation position of the target text of the current token, and obtaining the target text. The scheme provided by the application can embed information by using a hash algorithm and a sampling control mechanism in the process of generating the text, and can improve the naturalness of the output text and the unbiasedness of the statistical distribution.

An ultra-wideband end-fire antenna with a common aperture embedded in a metal carrier includes a metal cavity with a coaxial cable compartment on one side. A radiator module is connected to the bottom of the metal cavity via a radiator fixing slot. The radiator module includes a common aperture antenna substrate. A low-frequency radiator is printed on the side of the common aperture antenna substrate closer to the coaxial cable compartment, and a high-frequency radiator is printed on the side farther from the coaxial cable compartment. This invention utilizes a dual-band antenna in a common aperture design to enhance the channel capacity and anti-fading capability of the communication system. At the same time, by achieving the antenna's carrier conformal characteristics, high isolation, and miniaturization, it enriches the antenna's application scenarios and improves the overall performance of the communication system.

This invention belongs to the technical field of lithium-ion battery cathode materials, specifically relating to a sulfonic acid-based organic polymer, a sulfonic acid-based organic polymer / carbon nanotube composite material, its preparation method, and its application. The sulfonic acid-based organic polymer is prepared by a dehydration condensation reaction of 2,5-diaminobenzenesulfonic acid and hexaazabenzophenanthrene hexacarboxylic acid trianal. When used as a lithium-ion battery cathode material, it exhibits high specific capacity and excellent cycle stability, overcoming the solubility problem of organic cathode materials in electrolytes. When the sulfonic acid-based organic polymer is combined with carbon nanotubes and applied to lithium-ion battery cathode materials, battery performance is significantly improved, and the capacity remains stable even after long-term cycling. The synthesis methods of the sulfonic acid-based organic polymer and the sulfonic acid-based organic polymer / carbon nanotube composite material of this invention are simple, have abundant raw material sources, and good reproducibility, making them suitable for industrial production and possessing broad application prospects in the field of lithium-ion batteries.

The invention discloses a three-dimensional grid robust watermarking method and system based on spherical coordinate statistical characteristics, and the method comprises a watermark embedding stage and a watermark extraction stage, in the watermark embedding stage, three-dimensional grid vertexes are converted to a spherical coordinate space, a stable equivalent binning structure is constructed, and statistical characteristics are extracted, so that the three-dimensional grid robust watermarking is realized. And frequency domain transformation is carried out. In combination with a quantization domain binary mapping mode of quantization index modulation, watermark information is embedded into a frequency domain coefficient, and then a three-dimensional model carrying a watermark is generated through inverse transformation and coordinate reduction. The system comprises a coordinate conversion module, a binning module, a feature extraction module, a frequency domain transformation module, a watermark embedding module, an inverse transformation module, a vertex updating module and a model output module. The method provided by the invention has a large capacity up to 256 bits, and has significant robustness under rotation, scaling, translation, smoothing, simplification, vertex reordering and noise attack. The method can be widely applied to the technical field of three-dimensional data processing.

The application relates to a high-pressure-resistant PES filter membrane and a preparation process thereof, which comprises a porous main body, the porous main body comprises a mesoporous layer, a pre-filter layer and a separation layer in sequence along the thickness direction, the surface of one side of the mesoporous layer is a liquid inlet surface, the SEM average pore diameter of the pre-filter layer is larger than that of the mesoporous layer; the PMI average pore diameter of the filter membrane is 0.15-0.6 microns; a plurality of liquid inlet holes are distributed on the liquid inlet surface, the SEM average pore diameter K of the liquid inlet hole is 0.2-1.5 microns, and the hole area rate of the liquid inlet surface is 5-35%; the pore diameter of the liquid inlet hole is not less than 1.5K, which is a main liquid inlet hole, and the hole area rate of the main liquid inlet hole is 2-25%. After the mesoporous layer is introduced into the filter membrane, the mechanical property of the filter membrane is obviously improved, so that the pore structure of the porous main body on the liquid inlet surface and near the liquid inlet surface of the filter membrane does not deform too much under high pressure, so that the filter membrane still maintains a large effective flow channel area, and the high flux and high load of the filter membrane are ensured.

The application belongs to the technical field of comprehensive utilization of waste lithium-ion power battery, and discloses a deep eutectic lithium supplement and a method for repairing and regenerating positive electrode material of waste lithium-ion battery, wherein the deep eutectic lithium supplement is prepared by taking a solid-state reducing organic acid as a hydrogen bond donor and a solid-state lithium source as a hydrogen bond acceptor, mixing the hydrogen bond donor and the hydrogen bond acceptor, and reacting to obtain a deep eutectic melting state system; and the deep eutectic lithium supplement can be used for repairing and regenerating the positive electrode material of the waste lithium-ion battery. The application can prepare a liquid-state deep eutectic lithium supplement by using a solid-state reducing acid and a solid-state lithium source, is green and friendly, can realize self-limiting lithium supplement without strict control of the lithium supplement amount, has low energy consumption in the lithium supplement process, can greatly reduce the cost, and can be used for repairing and regenerating the positive electrode material of the waste lithium-ion battery.

This invention discloses a process for utilizing silica suboxide micropowder, its products, and applications. The process includes: (1) mixing silica suboxide micropowder, carbon nanotubes, a dispersant, and a solvent to obtain a raw material dispersion, stirring until uniform, then mechanically ball-milling the dispersion, and finally drying it to obtain a silica suboxide / carbon nanotube composite; (2) shaping the silica suboxide / carbon nanotube composite prepared in step (1) to obtain a silicon-based material / carbon nanotube agglomerate; and (3) carbon-coating the silicon-based material / carbon nanotube agglomerate prepared in step (2) to obtain a silicon-carbon composite material. The utilization process disclosed in this invention not only fully utilizes the micropowder resources, but also enables batteries assembled from silicon-carbon composite materials prepared using silica suboxide as raw materials to possess high initial efficiency, high reversible specific capacity, and excellent cycle stability, thus solving a series of problems existing in the direct use of silica suboxide micropowder in batteries.

The invention relates to the field of biology, and particularly provides a replication-deficient influenza virus vaccine skeleton which comprises a PA gene, an HA gene, an NP gene, an NA gene, an M gene, an NS gene and a PB2 gene of an influenza virus. The PB2 gene is replaced into a PB1 gene coding region of a vaccine skeleton; the open reading frame of the original PB2 gene can be replaced by an exogenous gene, so that the exogenous gene is inserted into the vaccine skeleton and expressed. The skeleton has the advantages that the capacity is large, the antigen can be efficiently and stably expressed, the passage is stable, and the like. Meanwhile, the invention also discloses a replication-defective influenza virus as well as a preparation method and application thereof.

The invention discloses a closed refrigeration type fraction collector, and relates to the technical field of fraction extraction.The closed refrigeration type fraction collector comprises a case, a refrigeration bin body is arranged in the case and comprises a main working cavity and an auxiliary working cavity, and the auxiliary working cavity is located at the top of the main working cavity; the base is fixedly and hermetically connected with the bottom opening of the main working cavity and is used for placing a test tube rack; a drainage groove is formed in the base, and a drainage hole penetrating through the base is formed in the drainage groove; the executing mechanism main body is connected with a fraction pipeline and can drive the output end of the fraction pipeline to penetrate through the top of the main working cavity and move to the position above an opening of a test tube arranged on the test tube rack; the refrigeration module is fixedly arranged on one side of the case, the refrigeration end of the refrigeration module communicates with one side of the main working cavity, a drainage channel is formed in the inner side wall of the side, close to the refrigeration module, of the main working cavity, and the drainage channel communicates with the drainage groove. On the premise that the low-temperature effect is guaranteed, the single-time collecting capacity and efficiency can be effectively improved, and meanwhile water accumulation in the bin is avoided.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The present application relates to ternary high-nickel lithium-ion battery cathode materials and a preparation method thereof. The general expression of the cathode material is Li(Ni 1‑a‑b‑c Co a Mn b D c )O2, 0.01

The utility model discloses valve production wax repairing equipment facilitating feeding. The valve production wax repairing equipment comprises a supporting table, a collecting groove is formed in the right side of the supporting table, a discharging groove is formed in the inner top of the collecting groove, a plurality of blocking strips are fixedly connected between the inner walls of the left side and the right side of the discharging groove, and a collecting tray is placed on the discharging groove; a notch groove is formed in the left side of the supporting table, and the right end of the belt conveying piece extends into the notch groove; and the collecting mechanism is used for collecting waste wax, a vertical plate is fixedly connected to the upper end of the rear side of the supporting table, a placing plate is fixedly connected to the front side of the vertical plate, and a universal pipe is fixedly connected to the upper end of the vertical plate. In the actual using process of the equipment, a wax body can be conveniently moved to the workbench, a waste wax collecting structure is arranged, waste wax can be conveniently collected in a centralized mode, and the situation that the waste wax is scattered on the workbench is avoided.

The present application belongs to the technical field of battery equalization device, especially relates to a lead-acid battery equalization device. The present application comprises: a processor module, a measurement battery selection module, a battery parameter storage module, an analog power supply module, a power module, a first charge-discharge circuit module, a second charge-discharge circuit module, and a communication module; the measurement battery selection module, the battery parameter storage module, the analog power supply module, the power module, the first charge-discharge circuit module, the second charge-discharge circuit module, and the communication module are respectively connected with the processor module; the processor module selects the first charge-discharge circuit module or the second charge-discharge circuit module through the measurement battery selection module to realize independent charge-discharge of single batteries; the first charge-discharge circuit module and the second charge-discharge circuit module sample and calculate the battery voltage in real time through the processor module to trigger the equalization operation. The present application is modularized and multi-node collaborative to realize precise charge-discharge control and real-time state monitoring.

The invention provides a composite positive plate, a preparation method thereof and a battery, and belongs to the technical field of batteries. The interface conductive layer is arranged on at least one side of the positive electrode active material layer, and the interface conductive layer comprises conductive filler and an elastic matrix. According to the composite positive plate, the interface conductive layer with conductivity, flexibility and elasticity is arranged on at least one side of the positive active material layer, so that when the composite positive plate is applied to the battery and the interface conductive layer is close to one side of the diaphragm, not only can the interface impedance be reduced, but also the wettability of electrolyte on the positive active material layer can be improved; when the interface conducting layer is close to one side of the shell, the positive electrode active material layer can be better protected, extrusion damage of the shell to the positive electrode active material layer is reduced, the interface conducting layer can serve as a current collector, the electrochemical performance of the battery is improved, and the interface conducting layer can adapt to volume expansion of the composite positive plate in the charging and discharging process of the battery and improve the cycle performance of the battery.

The invention discloses petroleum coke, a non-graphite carbon material, a negative electrode material and a preparation method thereof. The method comprises the following steps: performing first solid removal on a first heavy oil raw material to obtain first purified heavy oil; performing second solid removal on the second heavy oil raw material to obtain second purified heavy oil; mixing the second purified heavy oil with nano-porous carbon to obtain third purified heavy oil and heavy oil containing the nano-porous carbon; carrying out solid-liquid separation on the heavy oil containing the nano-porous carbon to obtain a non-graphite carbon material precursor and fourth purified heavy oil; mixing the third purified heavy oil, the fourth purified heavy oil and the first purified heavy oil to obtain heavy mixed oil; carrying out distillation, pyrolysis and modification treatment on the heavy mixed oil to obtain petroleum coke; carbonizing the non-graphite carbon material precursor to obtain a non-graphite carbon material; the negative electrode material is prepared from petroleum coke and a non-graphite carbon material. The petroleum coke and the non-graphite carbon material with relatively high quality are prepared, and the electrochemical performance of the negative electrode material can be improved.

The application discloses a kind of unmanned vending device and method based on mechanical hand and mixed storage cabinet cooperation, it is related to automatic vending technical field.The device includes vending big cabinet, is assembled by multiple modular rectangular mixed storage cabinet, and every mixed storage cabinet is equipped with double-stage gravity slide inside, and the upper and lower inclined plane is equipped with the array of independent actuation limiting component, and the end of upper inclined plane is equipped with limit switch, so that different specifications of goods are arranged in order and not jammed;Vending big cabinet front is equipped with plane positioning system and mechanical hand, and mechanical hand is equipped with holding part and movable clamping part;Control system executes order rearrangement and takes out goods logic: when target goods are located in non-first position, mechanical hand sequentially takes out front-positioned goods and re-enters the slide system of the mixed storage cabinet itself, and uses the gravity slide of mixed storage cabinet itself to complete queue reform, without additional cache position;Repeat the above action until target goods are taken out.The application solves the problem of "one way one product" of existing gravity vending machine, mixed storage of multiple specifications and complete unmanned vending.

The invention relates to the technical field of lithium ion batteries, in particular to a composite positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment. The invention provides a preparation method of a composite positive electrode material, which comprises the following steps: mixing a bulk phase dopant, a lithium source and a ternary precursor to obtain a mixture I, and respectively sintering at 815-830 DEG C for 12-14 hours and at 760-770 DEG C for 8-10 hours to obtain a sintered material I-1 and a sintered material I-2; a first coating agent and a second coating agent are mixed with the sintered material I-1 and the sintered material I-2 respectively and then coated, and a sintered material II-1 and a sintered material II-2 are obtained; and mixing the sintered material II-1 and the sintered material II-2 to obtain the composite positive electrode material. According to the invention, the bulk phase dopant and the doped ternary precursor core layer are firstly added, then the first coating agent and the second coating agent are added, and the surface functional layer is synthesized, so that the composite positive electrode material has both high capacity and high cycle stability under the synergistic effect of the bulk phase dopant and the doped ternary precursor core layer.

The application discloses a kind of hard carbon negative electrode material and preparation method thereof based on waste lithium battery diaphragm preparation.The hard carbon negative electrode material is prepared by using waste lithium ion battery PP / PE diaphragm as raw material, through raw material pretreatment, composite sulfonation pre-crosslinking, transient joule heat pulse carbonization, pickling purification step, its first charge specific capacity is greater than or equal to 310 mAh / g, first coulomb efficiency is greater than or equal to 90%, 1A / g cycle 500 cycles capacity retention rate is greater than or equal to 90%, and the performance is excellent.The application is coupled by composite sulfonation pre-crosslinking and transient joule heat rapid carbonization, compared with traditional process, energy consumption is reduced, and waste diaphragm is efficiently converted to high-performance hard carbon.

A method performed by a wireless device (130) is described herein. The wireless device (130) operates in a wireless communications network (100). The wireless device (130) provides (602) a message to be sent to a network node (110) operating in the wireless communications network (100). The message is a first scheduled message to be sent to the network node (110) in a random access procedure. The message comprises a first indicator (707) of a type of the message. The type of message has: a) a fixed size SDU (702), and b) a one byte header (704) comprising the first indicator (707) and lacking a second indicator (713) of a length of a payload. The wireless device (130) also initiates sending (603) the provided message to the network node (110). Also described is a method performed by the network node (110) receiving (1307) and initiating processing (1302) the message, based on the first indicator (707).

This invention discloses a method for preparing nickel-cobalt-manganese lithium oxide batteries from retired lithium cobalt oxide and lithium manganese oxide battery cathode materials. (1) After pretreatment processes such as discharge, disassembly, crushing, and sieving, retired lithium cobalt oxide and lithium manganese oxide batteries are obtained as cathode materials respectively. (2) The two cathode materials are mixed with NiSO4·7H2O and NiCO3 in a certain proportion and then calcined at high temperature for a period of time. (3) The calcined product obtained in the second step is thoroughly ground and then leached with deionized water to obtain lithium sulfate leachate and ternary precursor (leaching residue). (4) The lithium sulfate leachate is evaporated and concentrated, sodium hydroxide is added to adjust the pH, and then sodium carbonate is added for precipitation to obtain lithium carbonate product. This invention has the characteristics of simple process, green environmental protection and high utilization efficiency. It combines resource recycling with high-performance material regeneration and provides a sustainable solution for the recycling of waste lithium-ion battery cathode materials.

The utility model discloses a kind of through dynamic seat platform and through dynamic viewing system for cinema, through dynamic seat platform includes first platform, second platform, frame body and first chair frame, frame body is installed at the rear end of first platform, first platform bottom is hinged with second platform by pivot, second platform is installed with the mounting table with support, support is penetrated with rear adjusting shaft, angle adjusting plate is installed on rear adjusting shaft. The utility model is hinged with first platform and second platform, the relative rotation of second platform and first platform is realized, simultaneously, installing winch on first platform drives second platform to rotate relative to first platform, provides dynamic feeling for the viewing personnel on first chair frame, simultaneously, using drive cylinder to drive rear adjusting shaft to rotate, so that first chair frame occurs relative rotation, so that it and the visual angle of second chair frame at front end is staggered, avoid the visual angle interference of front row chair frame to rear row, improve the accommodation capacity of chair frame on platform, simultaneously guarantee functional viewing visual angle.

A separator for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The separator includes one or more fiber layers wherein at least one of the fiber layers includes a fiber network of fibers comprising a first copolymer, or at least one of the fiber layers includes a network of core-shell type fibers comprising a first copolymer. The first copolymer includes a copolymer of a monomer mixture, the copolymer including: a first structural unit including a unit derived from an aromatic unsaturated monomer; a second structural unit derived from a (meth) acrylic monomer, the (meth) acrylic monomer including an alkyl group having four or more carbon atoms in the main chain in an ester moiety; and a third structural unit derived from a sulfonic acid group-containing monomer.

This application discloses a wavelength division multiplexing (WDM) system, device, WDM communication method, and medium, belonging to the field of wireless communication technology. A multi-wavelength laser is used to generate input light of different wavelengths; a WDM multiplexer is used to combine and modulate the input light to obtain channels with different wavelength intervals; a demultiplexer is used to demultiplex the narrow wavelength interval channels of the WDM multiplexer to increase the number of channels in the system. This application provides a blue-green WDM optical communication system and implementation method based on a demultiplexer, using blue-green light WDM technology to improve system capacity and achieve a high-bandwidth and moderate-attenuation wireless optical communication system. WDM visible light communication is achieved through a multiplexer / demultiplexer with fine wavelength intervals for visible light.

The invention discloses a multi-channel low-crosstalk multi-layer stepped annular optical fiber and a design method thereof, and belongs to the field of optical communication, and the multi-layer stepped annular optical fiber comprises n (n is greater than or equal to 5 and less than or equal to 10) nested annular structure layers which are sequentially the first to nth annular structure layers from inside to outside; the refractive index of the outermost annular structure layer is smaller than or equal to that of silicon dioxide; the refractive indexes of the first to (n-3) th annular structure layers are greater than the refractive index of the outermost annular structure layer; the refractive index of the (n-2) th embedded structure layer is equal to that of the outermost annular structure layer; the refractive index of the (n-1) th annular structure layer is smaller than that of the outermost annular structure layer; the refractive indexes of the adjacent annular structure layers are different; the width range of the first annular structure layer to the (n-1) th annular structure layer is 1-6 [mu] m and is smaller than the width of the outermost annular structure layer. The number of orbital angular momentum modes which can be supported by the optical fiber and are good in effective refractive index separation can be increased, and therefore the optical communication capacity is improved.

The application belongs to the technical field of batteries, and discloses a battery cover plate and a battery. The battery cover plate comprises a cover plate body and a pole module. The cover plate body comprises a mounting plate body, an extension plate body and a protection plate body. The two sides of the mounting plate body are provided with inclined extension plate bodies. The low end of the extension plate body is connected with the mounting plate body, and the high end is connected with the protection plate body which is parallel to the mounting plate body. The junction and the middle part of the mounting plate body and the extension plate body are provided with protection bosses. The installation part is formed between the adjacent protection bosses. The protection boss is a hollow boss structure. The pole module is insulatedly connected in the installation part and on the extension plate body. The part of the pole module which is located outside the cover plate body is lower than the protection plate body. By making the part outside the pole module lower than the protection plate body, the space outside is reduced to improve the battery module assembly rate, and the damage caused by knocking is avoided. The space inside the protection boss and below the extension plate body is utilized to increase the volume of the pole group to improve the battery capacity. The multi-pole structure effectively improves the overcurrent capacity.