9results about How to "Prevent burn through" patented technology

The utility model discloses a chlorine liquefier tube head welding structure which comprises a tube plate and a plurality of heat exchange tubes, and the heat exchange tubes are arranged on the tube plate in a penetrating mode. The length of the part, extending out of the tube plate, of the tube head of the heat exchange tube is 0-1mm; the tube plate is provided with a groove used for being connected with a heat exchange tube, and the angle of the groove ranges from 45 degrees to 60 degrees. The heat exchange tube is in interference fit with the hole wall of the tube plate through expanded connection, and the groove is filled with a welding seam to fixedly connect the heat exchange tube with the tube plate. According to the chlorine liquefier pipe head welding structure, the welding quality of the chlorine liquefier pipe head can be improved, the connection reliability is enhanced, and leakage is effectively prevented.

The invention discloses conductive copper paste and a preparation method thereof, and belongs to the technical field of photovoltaic materials. The conductive copper paste takes base metal copper instead of noble metal silver as a core conductive component, and solves the problem of high cost of the existing conductive silver paste. The copper paste comprises the following components in percentage by weight: 72-85% of copper powder, 2.5-8% of glass powder, 8-12% of an organic carrier and 1-9% of an additive, the copper powder is spherical powder with D50: 0.5-5 [mu] m, preferably 1-2 [mu] m; the glass powder is prepared from at least two components such as PbO and SiO2 through a specific process, and the additive comprises an organic antioxidant and an inorganic antioxidant, so that a dual antioxidant system is formed. The special low-temperature glass powder is used for reducing the sintering temperature and blocking diffusion of copper ions, the copper paste is sintered at the high temperature of 500-600 DEG C in the air without inert gas protection in cooperation with a dual-oxidation-resistant scheme, the photoelectric conversion efficiency of the prepared solar cell reaches 26.586% to the maximum and is equal to that of commercially available silver paste, the raw material cost is only 1 / 100 of that of the silver paste, and the application range is wide. And the method adapts to the existing silicon-based battery process, and can realize commercialized large-scale mass production.

The utility model relates to the technical field of photovoltaic cells, and specifically provides a solar cell. The utility model aims to solve the problems that a barrier layer is too thin to cause metal slurry to burn through a polycrystalline silicon layer and too thick to cause too low short-circuit current of a battery and influence the efficiency of the battery. To this end, the present application provides a solar cell comprising: a silicon substrate; the tunneling oxide layer is arranged on the silicon substrate; the multi-layer polycrystalline silicon layer is arranged on the tunneling oxide layer; the barrier layer is arranged between two adjacent polycrystalline silicon layers; the passivation layer is arranged on the multi-layer polycrystalline silicon layer; a plurality of electrodes disposed on the passivation layer; the barrier layer comprises a plurality of first barrier parts and second barrier parts, the first barrier parts are in one-to-one correspondence with orthographic projections of the electrodes on the silicon substrate, and the thickness of the first barrier parts is greater than that of the second barrier parts; alternatively, the barrier layer includes only the first barrier portion. The polycrystalline silicon layer can be prevented from being burnt through by the metal slurry, and the influence of the barrier layer on the short-circuit current of the battery is reduced.

The utility model relates to the technical field of battery packs, and discloses a fireproof battery pack and a two-wheeled electric vehicle, the fireproof battery pack comprises a shell, a battery cell bracket and a plurality of battery cell monomers; the battery cell support and the plurality of battery cell monomers are accommodated in the shell, the shell and the battery cell support are structural parts made of long glass fiber reinforced polypropylene, the battery cell support is of an integrally formed structure, a plurality of mounting holes are formed in the battery cell support, and the battery cell monomers are arranged in the mounting holes. The plurality of battery cell monomers are accommodated in the plurality of mounting holes in a one-to-one correspondence manner, and the plurality of mounting holes are independent hole sites of which the side surfaces are not communicated with each other, so that the periphery of each battery cell monomer accommodated in the mounting hole is provided with a fireproof partition wall; the battery pack mainly solves the technical problem of how to improve the fireproof performance of the battery pack and reduce the risk of fire and explosion.

The application discloses a kind of automobile shock absorber technologies, to provide a kind of high-precision light-weight automobile shock absorber liquid storage pipe piece manufacturing method, its technical solution main points are as follows: S1, material pretreatment;S2, laser positioning roll welding: blank is sent into roll welding production line, laser positioning system projects weld track guide line on blank surface, is thus continuously roll forming, along guide line laser welding, real-time acquisition infrared thermal imaging data of weld pool, constructs weld pool temperature field dynamic distribution model, calculates the temperature gradient value in each 3mm of weld center line two sides, when temperature gradient value exceeds preset gradient threshold value, power and speed are automatically adjusted to maintain temperature field balance, control cylinder roundness error ≤±0.3mm, weld excess height ≤0.5mm;S3, numerical control spinning sealing;S4, double stop mouth integrated forming;S5, finishing;S6, surface treatment and deburring;S7, surface quality inspection;S8, finished product inspection and marking;The application is suitable for automobile shock absorber technical field.

This application discloses an ablation-resistant ceramicized polypropylene material and its preparation method. The polypropylene material comprises: 40-60 parts of polypropylene ceramic masterbatch, 30-40 parts of polypropylene glass fiber masterbatch, 20-30 parts of polyphenylene sulfide, and 0.5-1.0 parts of antioxidant. The polypropylene ceramic masterbatch comprises: 10 parts of polypropylene, 10-15 parts of ceramic powder, 5-12 parts of glass powder, and 0.5-2 parts of other additives. The polypropylene glass fiber masterbatch comprises: 10 parts of polypropylene, 5-10 parts of glass fiber, 2-5 parts of flame retardant, and 0.5-2 parts of other additives. The melt index of the polypropylene at 230℃ / 2.16Kg is 20-30 g / 10min, and the melt index of the polyphenylene sulfide at 315℃ / 5Kg is 150-300 g / 10min. This application can effectively overcome the problem of easy burn-through in polypropylene-based ceramicized materials before the formation of the ceramic layer.

The invention relates to the technical field of batteries, and discloses a solar battery, a preparation method thereof and a photovoltaic module. The solar cell includes: a silicon substrate; the passivation contact structure is arranged on the silicon substrate and comprises a first dielectric layer, a nano silicon layer, a second dielectric layer, a first doping layer, a first functional layer and a first electrode which are arranged in sequence; by arranging the nanometer silicon layer, light absorption can be improved, the passivation effect is enhanced, and the blocking effect on diffusion of doping elements in the first doping layer to the silicon substrate is enhanced; by sequentially arranging the first dielectric layer and the laminated structure formed by the nanometer silicon layer and the second dielectric layer, the double-layer protection effect is achieved, the depth and the concentration of doping elements diffused to the silicon substrate in the first doping layer are reduced, the situation that local thin-thickness positions of the dielectric layers or the first doping layer are burnt through by slurry can be effectively avoided, and the service life of the silicon substrate is prolonged. Therefore, the proportion of bright and dark pieces in luminescence detection is reduced, and the product yield and efficiency are improved.

The utility model discloses a battery case and monomer battery, this battery case includes the lower casing for accommodating electric core and the sealing element for sealing liquid injection hole, and the lower casing and sealing element are all fixedly connected to the upper casing, and the upper casing is rectangular board, and is equipped with liquid injection hole on one corner, wherein, the radius of liquid injection hole is recorded as R, and the distance of the center point of the circle of liquid injection hole to the nearest side edge of the upper casing is recorded as L1, and 0.1mm<=L1-R<=2mm. A battery case and monomer battery, the structure and position of setting liquid injection hole make that the battery case can keep the strength of having, and can effectively guarantee the sealing of liquid injection hole, simplify the manufacturing process simultaneously, effectively guarantee the safety of battery, improve the service life of battery.

This invention relates to the fields of non-ferrous metallurgical engineering, industrial circulating water treatment, and industrial artificial intelligence control technology. It discloses an intelligent heat-fluid coupled variable pressure circulating water system and a full-lifecycle scale prevention method and system. The method includes: the system powering on to generate a real-time state vector that has undergone quality verification; the real-time state vector being pushed to an edge computing unit or PLC coprocessor, outputting predicted values ​​of key thermal and water quality quantities within a future prediction window; obtaining risk prediction results and anomaly diagnosis conclusions; inputting the risk prediction results and anomaly diagnosis conclusions to an integrated setter, which is continuously updated in each strategy cycle based on constraint priority and safety coverage logic; and the updated sewage discharge setpoints and chemical dosing setpoints being sent to the heat-fluid coupled execution layer and the water quality dynamic balance execution layer. This invention effectively improves the operating efficiency and safety of the circulating water system, reduces maintenance costs, and extends the service life of the equipment.