17results about How to "Reduce energy density" patented technology

The invention discloses a processing method for a copper-clad ceramic substrate, which relates to the technical field of copper-clad ceramic substrate processing, and comprises the following steps of: taking a pre-treated copper-clad ceramic substrate, introducing nitrogen, and carrying out layered progressive micropore processing on an exposed aluminum oxide ceramic substrate of the pre-treated copper-clad ceramic substrate through picosecond laser to form micropores; each micropore is divided into an inlet layer, a middle layer and an outlet layer from top to bottom; the layer number of the micropores, the thickness of each layer of the micropores and the pulse width are controlled, and a light spot and long-focal-depth lens is adopted; adjusting monopulse energy and frequency parameters of picosecond laser, and punching an inlet layer; adjusting monopulse energy and frequency parameters of picosecond laser, and punching the middle layer; and adjusting monopulse energy and frequency parameters of the picosecond laser, and punching the outlet layer to obtain the copper-clad ceramic substrate. In the middle layer, the monopulse energy is gradually increased, and it is ensured that the material is evenly removed; at the inlet layer and the outlet layer, energy is reduced, and cracks caused by stress generated instantly when the material is punctured are avoided.

The application discloses a metal part plasma detonation treatment device, which comprises a capacitive induction power supply, a reaction chamber and a detonation gun. The capacitive induction power supply comprises a ring-shaped cathode electrode, a ring-shaped anode electrode and a center electrode. The center electrode is fixedly connected with the anode electrode. The reaction chamber is a ring-shaped cavity surrounding the anode electrode. The reaction chamber separates the cathode electrode from the anode electrode. The detonation gun is connected with a detonation gun ring chamber and is used for introducing combustible gas and performing periodic detonation. The nozzle is connected with the ring-shaped cavity and is used for introducing alloy elements. The metal part plasma detonation treatment device improves the hardening effect of the device on the metal surface, improves the uniform distribution of the alloy elements, and improves the modification quality and productivity of the workpiece surface.

A method of producing a liquid organic hydrogen carrier (LOHC). The method includes delivering a hydrocarbon feed stream rich in aromatic hydrocarbons to a thermal treatment unit to convert olefin compounds to heavier compounds by a dimerization reaction and generate a dimerized feed stream; delivering the dimerized feed stream to a fractionation unit to form a light fraction stream and a heavy fraction stream at a cut point of 115°C to 150°C; and delivering the light fraction stream to an aromatic hydrocarbon extraction unit to form an aromatic compound stream and a non-aromatic compound stream. The method also includes delivering the aromatic compound stream and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream; and delivering the hydrotreated effluent stream to a separator to remove unsaturated compounds, thereby isolating a saturated compound as a LOHC stream.

The application discloses a battery pack and a battery cell thereof, which comprises a battery shell and an electric core, the electric core is placed in the battery shell, an explosion-proof valve is arranged on the battery shell, the explosion-proof valve comprises a weak part, a blocking part is arranged on the battery shell, the blocking part is arranged at the periphery of the weak part, the thickness of the blocking part is greater than the thickness of the weak part, the blocking part comprises a blocking main structure, the area surrounded by the weak part is S1, the area surrounded by the outer edge of the blocking part is S2, S1 and S2 satisfy 0.03*10 4 ≤S1*(S2‑S1) / (Q*h1 / h2)≤20*10 4 Wherein, Q is the battery capacity, h1 is the thickness of the shell where the explosion-proof valve is arranged, and h2 is the thickness sum of the battery shell and the blocking main structure; the blocking main structure comprises a blocking platform. The battery pack and the battery cell thereof reduce the probability of the situation that the battery cell on fire spreads to the adjacent battery cell when the battery cell is in thermal runaway, and reduce the occurrence of heat spread when the battery is in thermal runaway.

This invention provides a battery module. A battery module includes: a laminate formed by stacking multiple battery cells; a pair of first components respectively disposed at both ends of the laminate along its stacking axis, clamping the laminate; and a pair of end plates respectively disposed at both ends of the laminate along its stacking axis, the first components being single-layer components including an elastomer, and configured in contact with the battery cells and the end plates.

A lithium secondary battery according to the present invention includes a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material consists of silicon, and in a graph of capacity-voltage measured by manufacturing a half-cell including the positive electrode and a lithium metal electrode and then discharging the half-cell at a constant current of 0.1 C, an inflection point appears in a region in which a voltage is 3.3 V to 3.7 V, and the capacity of the positive electrode at the inflection point is 3% to 25% of the capacity of the positive electrode at a final charge voltage.

The utility model relates to the technical field of batteries, in particular to a battery device, which comprises a plurality of batteries stacked along the Z direction and at least comprising an accommodating space; the pressure relief structure is arranged in the accommodating space and corresponds to the step surface, and the pressure relief structure is used for puncturing the step surface to realize pressure relief under the condition that the interior of the first battery reaches bursting pressure; a pole of the second battery is arranged in the accommodating space and is positioned on the second surface; in the Z direction, a first distance h is arranged between the surface, close to the first face, of the pole and the first face, and the range of the first distance h is 1 mm < = h < = 24 mm. The first distance is controlled within a certain range, the enough distance between the first surface and the pole is ensured, and when the pressure relief structure punctures the first surface to perform pressure relief blasting, the accommodating space has enough space for buffering, so that the impact of gas-liquid substances sprayed out by pressure relief on the pole can be reduced as much as possible, the influence of battery blasting on adjacent batteries is reduced, and the service life of the batteries is prolonged. And short circuit of adjacent batteries is avoided.

The invention discloses a negative current collector with a carbon-containing functional layer and a preparation method of the negative current collector, and relates to the technical field of current collectors. The negative current collector comprises a base material and a carbon-containing functional layer coated on the surface of the base material; the carbon-containing functional layer comprises the following raw materials in parts by weight: 40-50 parts of a carbon skeleton, 25-35 parts of a sodium-philic material, 18-24 parts of a binder and 0.5-2 parts of a surfactant; the binder is composed of a porous imidazolium-based binder and sulfonated-polyether ether ketone-Na in a mass ratio of (2-3): 1. According to the prepared negative electrode current collector, the energy density when the negative electrode current collector is used for a sodium ion battery is effectively improved, and risks caused by sodium dendrites generated by a negative electrode in the charging process are reduced.

The application discloses a kind of full tab battery multilayer tab directional flow injection process, comprising the following steps: step one, the full tab battery pole piece with multilayer tab structure is prepared, and the surface of pole piece is formed directional flow groove and conical flow hole by laser etching or mechanical stamping, and flow groove is distributed along the length direction of pole piece and is connected with the staggered connection of multilayer tab group;By designing multilayer tab structure on the surface of the pole piece of full tab battery, combined with directional flow groove and flow hole, the electrolyte infiltration path is optimized, the synergistic effect of the spatial distribution of multilayer tab and flow groove is utilized, the efficient and uniform distribution of electrolyte is realized, the injection time is significantly shortened, the bubble residue is reduced, and the battery energy density and cycle life are improved.The flow design of multilayer tab and dynamic vacuum injection parameter control are suitable for high-capacity battery manufacturing, such as power battery and energy storage battery.

A heater arrangement for an apparatus for layer-by-layer formation of a three-dimensional object by the consolidation of particulate matter, the heater arrangement having a heater arrangement area, and comprising: one or more shrouded radiative heating elements, arranged over the heater arrangement area, the shrouded radiative heating elements being operable to heat particulate matter at a build bed surface of said apparatus to a desired temperature profile; and one or more radiation-restricting shrouds, which are arranged in communication with the shrouded radiative heating elements, and each of which form one or more passages for restricting the solid angle over which radiation is emitted by the shrouded radiative elements, each passage having a first end which opens towards at least one of said shrouded radiative heating elements, and a second end which opens to the exterior. Also provided is apparatus for layer-by-layer formation of a three-dimensional object by the consolidation of particulate matter, the apparatus comprising: a working space having opposing bottom and top sides; a build bed surface on said bottom side of the working space and upon which successive layers of said object are formed, the build bed surface comprising a printable area; and a heater arrangement area on said top side of the working space and comprising a plurality of spaced-apart radiative heating elements arranged on said top side of the working space, the radiative heating elements being operable to heat particulate matter at the build bed surface to a desired temperature profile; wherein said plurality of spaced-apart radiative heating elements comprises a first group of four or more radiative heating elements; and wherein, as viewed from said top side of the working space, said first group of four or more spaced-apart heating elements is arranged beyond and around the perimeter of printable area and within the heater arrangement area.

The application relates to the technical field of laser micro-nano processing, and particularly provides a femtosecond laser processing system and method, wherein the femtosecond laser processing system comprises a laser emission module and a beam shaping module; the beam shaping module comprises a pulse separator, a spatial light modulator and a beam expander; the laser emission module, the pulse separator, the beam expander and the spatial light modulator are sequentially arranged; the laser emission module is used for emitting laser pulses; the laser pulses sequentially pass through the pulse separator and the beam expander and then reach the spatial light modulator; the pulse separator is used for splitting the laser pulses and introducing a pulse delay time between the split laser pulses; the beam expander is used for expanding the laser beam; and the spatial light modulator is used for shaping a Gaussian beam into a flat-top beam. The application has the effect of improving the processing quality of nanochannels on a grating surface.

The utility model relates to the technical field of batteries, in particular to a battery cap and a battery. The battery cover cap comprises a sealing part and a sealing part, wherein the sealing part comprises a coating part surrounding the circumferential side wall of a pressure relief part and a bearing part arranged on one side, facing the interior of a battery, of the pressure relief part; a gap is formed between the bearing part and the pressure relief piece in the thickness direction of the pressure relief piece, and the gap is filled with the connecting piece, so that the sealing piece and the pressure relief piece are bonded; the protection layer is arranged on the side, away from the pressure relief piece, of the bearing part. The thickness of the protective layer is L, and L is larger than or equal to 0.15 mm and smaller than or equal to 0.8 mm. According to the utility model, the situation that the sealing piece falls off is avoided by arranging the connecting piece, the protective layer plays a role in buffering, the situation that the pressure relief piece deforms due to the fact that the rolling groove on the shell extrudes the sealing piece is avoided, the situation that the internal space of the battery is excessively occupied and the energy density of the battery is reduced is avoided, and the normal opening of the pressure relief piece is ensured; the safety performance of the battery is improved.

This application provides a single-cell battery, an energy storage device, an energy storage system, and a power supply system. The single-cell battery includes a casing; a cell, including a cell body and a tab connected electrically; a restraining member, including a side plate, a bottom plate, and a guide plate, the side plate being disposed around the outer periphery of the bottom plate and the bottom plate and the side plate defining a mounting groove, the bottom plate having a through groove, the guide plate protruding from the surface of the bottom plate facing the mounting groove and disposed around the outer periphery of the through groove; a tab passing through the through groove and partially located within the mounting groove; and an end cap assembly disposed on the side of the restraining member away from the cell body, the end cap assembly including an adapter, the adapter being connected to the end of the tab away from the cell body; the dimension of the tab passing through the through groove is w1, the dimension of the guide plate along a first direction is w2, the distance from the connection point of the adapter and the tab closest to the cell body to the end face of the tab away from the cell body is w3, then 2≤(w1-w3) / w2≤8.

An electrochemical apparatus is provided, including a packaging bag, an electrode assembly, and a conductive plate. The packaging bag includes a body portion and a sealing portion. The electrode assembly is disposed in the body portion, and the conductive plate is electrically connected to the electrode assembly. The body portion includes a first end wall and a second end wall disposed opposite to each other in a first direction, and further includes a first side wall and a second side wall disposed opposite to each other in a third direction. The sealing portion includes a first sealing portion and a first folded edge portion disposed opposite to the first side wall in the third direction. The first sealing portion connects to the first end wall, and the conductive plate protrudes out of the packaging bag from the first sealing portion. The first sealing portion and the first folded edge portion intersect in a transition zone. A folded corner structure, and the folded corner structure is is formed by folding the transition zone toward the first end wall at least twice. This application further provides a preparation method for electrochemical apparatus and an electronic apparatus. This application can increase energy density.

The utility model relates to an MOPA laser processing subsystem which comprises a shell, a laser head and a light path adjusting device, the laser head and the light path adjusting device are both arranged in the shell, the shell is provided with a laser emission port, the light path adjusting device and the laser emission port are both located on a light path of laser emitted by the laser head, and the laser path adjusting device is arranged on the shell. The light path adjusting device comprises a beam expanding lens assembly and a field lens assembly, and the beam expanding lens assembly is arranged on a light path between the laser head and the field lens assembly. According to the MOPA laser processing subsystem provided by the utility model, the problems that the existing laser processing system needs to be subjected to complex adjustment and the subsequent maintenance cost is relatively high are solved.

This application discloses a circularly tangential flat flame nozzle and its combined array structure, relating to the field of nozzle structures. It includes a nozzle body with an inlet end and an outlet end at both ends. Gaseous oxidant enters from the inlet end and exits from the outlet end. The inlet end has a circular cross-section, and the projection of the outlet end along the axis of the nozzle body's inlet end is elliptical. The outlet end is arc-shaped, with its axis perpendicular to the plane containing the major axis of the ellipse and the inlet end axis, and the arc axis intersects with the inlet end axis. This provides a sufficiently large scattering area, allowing the process gas and oxidant to mix thoroughly at the nozzle outlet, improving the combustion efficiency of the process gas, and forming a uniform temperature distribution in the reactor combustion chamber.

The application provides a spraying workpiece installation site coating precise removal system and method, relates to the surface treatment technical field in mechanical manufacturing, and the system comprises a visual scanning module, a positioning module, a control system, an executing mechanism, a real-time monitoring module and an auxiliary device, and the method comprises the following steps: system initialization and calibration steps, visual scanning and hole site three-dimensional positioning steps, path planning and laser parameter adaptation steps, multi-mechanical arm collaborative work deployment steps, coating removal execution and real-time regulation steps and quality detection and correction steps. The application realizes a dynamic coupling adjustment mechanism of the track point density and the laser parameter, improves the scanning rate to improve the efficiency, achieves the double optimization goals of efficiency and quality, and provides a basis for realizing efficient and intelligent laser coating removal.