9 results about "Thin diaphragm" patented technology

The invention relates to a preparation method of sphere-like superfine boehmite, and belongs to the technical field of materials. According to the method, accurate control over the morphology and the particle size of boehmite is achieved through the two-step hydrothermal reaction of'first acid and second alkali ', the first hydrothermal reaction controls oriented growth of boehmite under induction of boehmite seed crystals, and a spheroidic boehmite prototype is formed; in the second hydrothermal reaction, the boehmite precursor obtained by the first hydrothermal reaction is deeply modified in an alkaline environment, and the boehmite is regularized into a sphere-like shape. The boehmite prepared by the method has high purity, ultrafine particle size and regular sphere-like morphology, and is especially suitable for being used as a coating material and a high-end precision polishing material of a high-end lithium battery ultrathin diaphragm.

The invention relates to the technical field of intelligent logistics, and discloses a multifunctional AGV (Automatic Guided Vehicle) supercapacitor process and an electric quantity management and control method, and the method comprises the steps: winding: employing an ultrathin diaphragm with the thickness of 10-15 [mu] m, and calculating and adjusting the slicing length; the initial tension is controlled to be 5-8 N, the electrode plate and the diaphragm are wound, and the winding diameter is gradually reduced to 3-5 N along with increase of the winding diameter till a specified winding core is achieved; liquid injection: baking the battery cell in vacuum, and pumping the interior of the battery cell into a negative-pressure vacuum interval through a high-vacuum pipeline; rapidly pumping 90%-95% of electrolyte into the battery cell in a negative pressure manner; finally, a small amount of liquid is supplemented until the specified liquid injection amount is reached; and aging: enabling the electrolyte in the battery cell to reach a boiling point by adopting a high-low temperature impact mode, and then performing constant-voltage charging at high temperature and high pressure to complete aging. By means of the characteristics of rapid charging and long cycle life of the super capacitor, the AGV trolley has the advantages of rapid charging, efficient operation and long service life, the electric quantity is controllable, charging is controllable, and the anxiety problem of repeated calculation and endurance mileage is avoided.

The invention discloses a forming process and a forming device of an ultra-thin diaphragm, and relates to the technical field of diaphragm forming, and the forming process comprises the following steps: cleaning the diaphragm by adopting a cleaning assembly, uniformly smearing stamping oil on the cleaned diaphragm through a coating assembly, fixing the diaphragm smeared with the stamping oil on a mold, and forming a central hole; the deformation stress in the forming process is released in advance, the diaphragm is subjected to segmented stamping to form a formed diaphragm, and the formed diaphragm is subjected to post-treatment; the forming process is set, the forming sequence is optimized, a center hole is pre-punched before arc forming, deformation stress in the arc forming process is released, the conditions of cracking, deformation and wrinkling of a diaphragm in the forming process are reduced, the profile of a cavity of the die is completely matched with a continuous arc structure of the diaphragm, continuous pressure maintaining operation is conducted during punch forming, and the production efficiency is improved. And the membrane is cleaned through the cleaning assembly, and membrane cracking caused by particle extrusion is avoided.

The invention provides a preparation method of a solid-state lithium battery diaphragm, which comprises the following steps: preparing diaphragm slurry, uniformly coating a substrate with the diaphragm slurry to form a wet diaphragm, covering the wet diaphragm with a high polymer material plate, then covering the high polymer material plate with a quartz glass cover plate, and carrying out static pressure to obtain a diaphragm assembly; after the diaphragm assembly is cured, the glass cover plate and the high polymer material plate are removed in sequence, the cured diaphragm is stripped from the substrate, and a formed diaphragm is obtained; and extracting, drying and rolling the formed diaphragm to obtain the solid-state lithium battery diaphragm. The invention also provides application of the solid-state lithium battery diaphragm prepared by the preparation method, and the solid-state lithium battery diaphragm is used for preparing a lithium battery. The preparation method of the solid-state lithium battery diaphragm is simple in process and low in cost; the thickness of the prepared battery diaphragm is determined by the mechanical thickness of the high polymer material plate, so that the ultrathin diaphragm can be realized; the performance is excellent, and the porosity and the air permeability are good.

The present application relates to a kind of ultra-thin earphone diaphragm laser precision welding equipment and method, for solving the problem of easy deformation when ultra-thin diaphragm and diaphragm frame welding. Including sequentially arranged feeding section, laser processing platform and discharging section along material flow direction, laser processing platform is integrated with laser heating part, laser cutting part, laser drilling part, micro tin ball implantation part and laser welding part. By laser heating part, pre-set wire coil is accurately scanned and heated, so that it forms non-destructive bonding with diaphragm;Then profile cutting and femtosecond laser synchronous drilling are carried out in turn;Then micro tin ball is implanted after turning positioning;Finally, spatial light modulation technology is used to realize multi-welding point synchronous laser welding. The present application ensures that ultra-thin diaphragm maintains structural integrity during the entire welding process by step laser processing and thermal management control, and simultaneously realizes efficient and high-precision parallel processing using beam shaping technology, significantly improves production yield and welding quality.

The utility model relates to the technical field of diaphragm processing, in particular to a diaphragm thinning device which comprises an unwinding assembly, a winding assembly, a thinning assembly and a mold temperature assembly. The multiple sets of thinning assemblies are arranged, and the thinning assemblies are provided with gaps allowing the membranes to pass through and used for thinning the membranes. The unwinding assembly, the thinning assembly and the winding assembly are sequentially arranged in the conveying direction of a membrane. The mold temperature assembly communicates with the thinning assembly and is used for adjusting the temperature of the thinning assembly. The problem that the performance of a supercapacitor is affected due to the fact that the uniformity of the thickness of the activated carbon membrane is difficult to effectively guarantee because a single group of roller presses are usually adopted for extrusion membrane forming in the preparation of the activated carbon membrane is solved.

This invention discloses a pipeline pressure sensor structure to prevent fluid stagnation, belonging to the field of pressure sensors for fluid detection. It includes a main body, a top cover, a base, a housing, a pressure sensor head, a sensor bracket, and a cable. The main body has a fluid channel at its center, and a sensor head mounting hole is provided on the inner wall of the fluid channel. A fixing bracket with a thin diaphragm at its bottom is installed in the sensor head mounting hole. The bottom of the fixing bracket has a boss structure with an inclined surface that protrudes into the fluid channel. The pressure sensor head is fixed by the fixing bracket, and its pressure-sensitive surface contacts the thin diaphragm. The sensor bracket is sleeved on the outer wall of the pressure sensor head and located above the fixing bracket. The housing is sleeved on the outside of the pressure sensor head to form a protective shell. One end of the cable is connected to the pressure sensor head, and the other end extends out of the housing. The top cover has a limiting block for fixing the sensor bracket. The pressure sensor structure of this invention can prevent fluid stagnation inside the sensor measurement area, thereby improving measurement accuracy.

The application provides a preparation method of a fast-ion-conducting puncture-resistant ultra-thin diaphragm based on a concentric three-layer gradient structure carbon nanometer fiber, comprising the following steps: step 1, blending polyacrylonitrile and aldehyde monomers in a solvent A to prepare an aldehyde-containing spinning solution; step 2, spinning the spinning solution to prepare an aldehyde-containing fiber membrane; step 3, in-situ growing a multi-level pore COF intermediate layer in the aldehyde-containing fiber membrane in an amino monomer, a catalyst and a solvent B to prepare a porous COF fiber; step 4, sequentially performing pre-oxidation and high-temperature isostatic carbonization on the porous COF fiber to prepare a dense COF carbonized fiber membrane; and step 5, loading a titanium source gel layer on the upper and lower surfaces of the dense COF carbonized fiber membrane, and converting the gel into a titanium dioxide nanocrystal outer layer in a solvent C to prepare a puncture-resistant carbon nanometer fiber ultra-thin diaphragm. The diaphragm has the advantages of an ultra-thin thickness, excellent mechanical strength, ultra-high ion conductivity and dendritic puncture resistance, and is suitable for a high-safety long-service-life battery system.