11 results about "Nail penetration" patented technology

This application provides a secondary battery and electronic device, belonging to the field of energy storage technology. The secondary battery includes a positive electrode sheet, which comprises a positive current collector, a solid electrolyte layer, and a positive electrode material layer. The solid electrolyte layer includes a first solid electrolyte layer and a second solid electrolyte layer. Along the thickness direction of the positive electrode sheet, the first solid electrolyte layer is disposed on one surface of the positive current collector, and the second solid electrolyte layer is disposed on the other surface of the positive current collector opposite to the first solid electrolyte layer. The positive electrode material layer is located on the surface of the first solid electrolyte layer opposite to the positive current collector and the surface of the second solid electrolyte layer opposite to the positive current collector. The first solid electrolyte layer comprises an oxide solid electrolyte, and the second solid electrolyte layer comprises a sulfide solid electrolyte. This application improves the pass rate of the battery cell in the nail penetration test and suppresses local temperature rise during the nail penetration process by controlling the solid electrolyte layer of the positive electrode sheet, thereby reducing the risk of thermal runaway.

The utility model discloses a garden drainage plate connecting structure, which comprises a connecting plate and two adjacent drainage plates, the drainage plates are integrally connected with a fixing column, the connecting plate is provided with a connecting hole for the fixing column to pass through, and the fixing column is clamped with a knob type tensioner for tightly pressing the connecting plate and the drainage plates. The fixing columns are integrally formed on the drainage plates, the two drainage plates are connected through the connecting plate and fixed through the knob type tensioner, connection and fixation of the connecting plate to the two drainage plates are completed, fixation in an anchor penetrating mode is not needed, the situations that the structural integrity of the drainage plates is damaged, and leakage is caused are avoided, and the drainage plates are convenient to use. The technical problems that an existing drainage plate needs to be fixed in a rivet penetrating mode, the structural integrity of the drainage plate is damaged, and the leakage risk is likely to be caused are solved.

This invention relates to the field of lithium-ion battery technology, and more specifically, to a high-safety lithium-ion battery. The high-safety lithium-ion battery includes an electrode assembly and an in-situ cross-linked flame-retardant gel electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a composite separator disposed between the positive and negative electrodes. The in-situ cross-linked flame-retardant gel electrolyte is prepared from raw materials comprising the following mass percentages: 15%–25% polymer monomer, 10%–20% flame retardant, 5%–18% lithium salt, 0.3%–1.5% initiator, and 35.5%–60% solvent. The in-situ cross-linked flame-retardant gel electrolyte formed by mixing the above components can form a stable three-dimensional network, fixing the flammable electrolyte and blocking electron short-circuit paths. Combined with the composite separator, it forms double protection, ensuring that the battery does not ignite or explode during nail penetration testing, maintains a high 6C capacity retention rate, and also performs safely during 70% deformation compression testing.

The application provides an electrochemical device and an electronic device. The electrochemical device comprises a positive electrode sheet, the positive electrode sheet comprises a positive electrode current collector, a first coating layer and a positive electrode material layer, the first coating layer is arranged on the surface of the positive electrode current collector, and the positive electrode material layer is arranged on the surface of the first coating layer away from the positive electrode current collector. The first coating layer comprises a first main material and a first binder, the first main material comprises a lithium supplement material, and the lithium supplement material comprises at least one of lithium iron phosphate, lithium manganese iron phosphate, lithium orthosilicate or lithium ferrite; the infrared spectrum of the first coating layer has a characteristic peak between 3200 cm ‑1 and 3400 cm ‑1 . The electrochemical device provided by the application can balance the nail penetration safety performance, capacity and volume energy density.

To provide a pharmaceutical composition excellent in solubility of an antifungal agent and permeability to a nail.SOLUTION: A pharmaceutical composition comprising an aerosol stock solution and a propellant, wherein the aerosol stock solution comprises 1 to 18% by mass of the following components (A) to (C), (A) an antifungal agent, (B) a solvent, and (C) water in the aerosol stock solution, the component (B) is a solvent having a Hansen solubility parameter located within a Hansen solubility sphere having a radius of 12.6 centered on (δ D = 17.5, δ P = 15.9, δ H = 6.9), and the propellant comprises carbon dioxide gas.SELECTED DRAWING: None

To provide a pharmaceutical composition excellent in solubility of an azole-based antifungal agent and permeability to nails.SOLUTION: (C) 1 to 18% by mass of water, and (D) 54% by mass or more of ethanol, wherein the components (B) are solvents whose Hansen solubility parameter is located within a Hansen solubility sphere with a radius of 12.6 centered on (δ D = 17.5, δ P = 15.9, δ H = 6.9), and the solvents include at least one or more selected from the group consisting of (B1) benzyl alcohol, 1-phenylethanol, and 2-phenylethanol.SELECTED DRAWING: None

The invention provides an electrochemical device and an electronic device, the electrochemical device comprises a positive pole piece, the positive pole piece comprises a positive current collector, a first coating and a positive material layer, the first coating is arranged on the surface of the positive current collector, and the positive material layer is arranged on the surface, away from the positive current collector, of the first coating; the first coating comprises inorganic particles, and the inorganic particles comprise at least one of nano boehmite, aluminum oxide, titanium dioxide, magnesium oxide, zirconium oxide or zinc oxide; the positive electrode material layer comprises a first conductive agent, and the first conductive agent comprises a first carbon nanotube; the length of the first carbon nanotube is 2-5 [mu] m, and the diameter of the first carbon nanotube is 2-100 nm; and the ion transference number of the positive electrode material layer is 0.4-0.47. The electrochemical device provided by the invention can consider the nail penetrating safety performance, the low-temperature cycle performance and the quick charging performance.

An electrochemical device includes a positive electrode plate. The positive electrode plate includes a positive electrode current collector, a first coating layer, and a positive electrode material layer; the first coating layer is disposed on a surface of the positive electrode current collector; the positive electrode material layer is disposed on a surface of the first coating layer facing away from the positive electrode current collector; the first coating layer includes a first main material and a first binder; the first main material includes a solid-state electrolyte; a carbon material is provided on a surface of the solid-state electrolyte; the first main material has a Dv50 of 50 nm to 200 nm; and the first coating layer has a thickness of 0.5 µm to 2 µm. The electrochemical device of the present application has good nail penetration safety performance while achieving good cycling performance and low-temperature discharge performance.

The present application relates to the technical field of phenolic board nail penetration, in particular to an automatic phenolic board nail penetration machine, which is used in cooperation with a phenolic board and a phenolic board nail, and comprises a frame body, a conveying mechanism, a nail conveying mechanism and a nail penetration mechanism, wherein the frame body comprises a track frame and a platform frame, the track frame is a frame structure as a whole and is symmetrically arranged on both sides of the platform frame, and the track frame adjustably supports the conveying mechanism and the nail conveying mechanism, the nail penetration mechanism is provided in different connection modes, so that the pushing and penetration processes can be combined into one process, or the pushing and penetration processes can be arranged separately, and the pushing process and the penetration process have the same structure, so that the pushing process and the penetration process can be switched by changing the different connection modes, and the pushing and penetration processes can be flexibly changed according to the needs of the nail penetration at different positions of the phenolic board.

The application provides an electrochemical device and an electronic device. The electrochemical device comprises a positive electrode sheet, the positive electrode sheet comprises a positive electrode current collector, a first coating layer and a positive electrode material layer, the first coating layer is arranged on the surface of the positive electrode current collector, and the positive electrode material layer is arranged on the surface of the first coating layer away from the positive electrode current collector. The first coating layer comprises a first main material, the first main material comprises a lithium-rich manganese-based material or a metal oxide, and the mass percentage of the first main material is 20% to 95% based on the mass of the first coating layer. The membrane sheet resistance of the positive electrode sheet is R1 Ω when the state of charge is greater than 80%, and the membrane sheet resistance is R2 Ω when the state of charge is 0% to 50%. 100%≤(R1-R2) / R2×100%≤500%. The electrochemical device provided by the application can improve the fast charging performance while ensuring good nail penetration safety.

A battery has an electrode assembly with two electrodes, namely a positive and a negative electrode; an electrically conductive cover plate; a contact element; and a housing. The electrode assembly and the electrically conductive cover plate are accommodated in the housing, and the electrically conductive cover plate is electrically conductively connected to a first electrode of the two electrodes and to the contact element. The contact element is guided outwards through an opening in the housing. An additional structure is provided between the cover plate and the housing, the additional structure being electrically conductively connected directly or indirectly to the contact element, and a current path from the additional structure to the contact element has a higher resistance than a current path from the cover plate to the contact element, which can reduce the potential risk of a short circuit during a nail penetration test.