14results about How to "Reduce expansion force" patented technology

The invention relates to a springback-reducing sprayed concrete admixture suitable for alpine and low temperature and application of the springback-reducing sprayed concrete admixture. The springback-reducing sprayed concrete admixture comprises the following components: 50-80 parts of a water reducing agent; 5 to 30 parts of a graphene oxide-nano chitin copolymer; 400 to 500 parts of a nano active component; 20-40 parts of an auxiliary material; and 300 to 450 parts of water. Nano chitin (ChNF) prepared by a TEMPO method is subjected to silanization modification and then is grafted with graphene oxide to obtain GO-ChNF. In the concrete, the graphene oxide, the nano chitin and the nano active component are compounded in proportion, a two-dimensional lamellar structure of GO and the nano chitin can be bridged between hydration products and cooperate with auxiliary materials to achieve a lubricating effect, the flowing working performance of the sprayed concrete is improved while the bonding performance is not lost, spraying construction is smooth, pipe blockage is avoided, and the service life of the sprayed concrete is prolonged. The construction efficiency is improved and the cost is reduced. The copolymer can reduce the porosity in the concrete by 15-20%, and can form a barrier layer on a concrete interface, thereby effectively preventing harmful substances such as moisture, chloride ions and the like from invading, protecting the internal structure of the concrete and improving the durability of a support system.

The utility model discloses a battery pack and a vehicle, and belongs to the technical field of batteries. The battery pack comprises a plurality of battery columns and at least one connecting assembly, the plurality of battery columns are distributed at intervals in the first direction, a gap is formed between every two adjacent battery columns, and the connecting assembly is arranged in the first gap; the battery column comprises a plurality of battery monomers, the plurality of battery monomers are distributed along a second direction, the connecting assembly comprises a connecting piece and a bonding piece, the bonding piece is arranged between the connecting assembly and the battery monomers and is connected with the connecting assembly and the battery monomers, and the connecting piece is provided with a through hole; the through hole penetrates through the connecting piece in the first direction. The bonding piece covers the through hole, or the through hole penetrates through the bonding piece; the first direction intersects the second direction.

A fuel tank according to an embodiment of the present invention may include: a first recessed member, which is recessed on one side of the first recessed member to form a receiving space, is open at the other side of the first recessed member, and has a first flange portion formed on the open side of the first recessed member, the first flange portion is bent to partially cover the receiving space; and a second recessed member, which is connected to the first recessed member on the other side of the first recessed member to form a sealed closed space, the second recessed member is open on one side of the second recessed member, has a second flange portion on the open side of the second recessed member, and is recessed on the other side of the second recessed member to form the receiving space, the second flange portion is bent to partially cover the receiving space.

The present application relates to the technical field of batteries, and in particular to a battery and an electrical device. The battery includes a plurality of battery cells arranged in a certain direction, the battery cell includes an electrode assembly and a shell, the electrode assembly is placed in the shell, and the plurality of battery cells include a first battery cell and a second battery cell, the first battery cell and the second battery cell are configured so that when the number of electrical cycles of the battery is greater than or equal to 100 times, the full charge group margin of the first battery cell is less than 1, and the full charge group margin of the second battery cell is greater than 1; the full charge group margin refers to the ratio of the maximum size of the electrode assembly to the minimum size of the shell along the arrangement direction of the plurality of battery cells when the battery cell is in a fully charged state. In view of the above problems, the battery provided in the embodiment of the present application can reduce the overall external expansion force of the plurality of battery cells, prevent the battery cells from causing extrusion damage to other components of the battery, and improve the electrical connection stability and safety of the battery.

The present invention relates to the field of battery technology, and in particular to a negative electrode sheet and a battery. A negative electrode sheet comprises a current collector and a coating disposed on at least one side of the current collector along the thickness direction; the coating comprises an active substance; the active substance comprises graphite and a silicon-based material, wherein the volume expansion coefficient of the silicon-based material is A, the hardness coefficient of the graphite is B, and the unit of B is g / cm 3 ; A and B satisfy: 16≤A*B / 0.15≤21. A battery, comprising the negative electrode plate. The present application allows a silicon-based material with greater expansion force to be matched with harder graphite, and allows a silicon-based material with relatively smaller expansion force to be matched with relatively softer graphite, and can improve the cycle degradation problem that occurs when graphite and silicon-based materials are used together in a relatively simple way without sacrificing energy density and gram capacity.

The utility model provides a kind of electric-shock remelting's slab ingot crystallizer, including two groups of mutually symmetrical setting by corrugated working copper plate and being formed slab ingot crystallizer half module;Two groups of mutually symmetrical setting slab ingot crystallizer half module left and right ends are each equipped with connecting plate, bolt hole is equipped on connecting plate, and two groups of symmetrical setting slab ingot crystallizer half module are fixedly connected by bolt hole, and constitute slab ingot crystallizer.Combination slab ingot crystallizer by corrugated working copper plate is formed, and the working copper plate in width direction is greatly improved due to using folding process, and the deformation resistance of wide copper plate is greatly improved.Wide copper plate is decomposed into 6 strip copper plates with width W / 6 due to using corrugated process, and the working copper plate of electric-shock remelting slab ingot crystallizer is formed into corrugated structure with high stability, and the adjacent copper plate of each strip copper plate is connected in the form of fold line.

The invention discloses a method and device for repairing a deformed casing, and the method comprises the steps: carrying out the perforation operation of a casing deformation point of the casing, and carrying out the perforation of the casing to form a cavity between the casing and cement and rock behind the casing, and the cavity is used for releasing the extrusion force of a stratum at the casing deformation point on the casing; and performing casing shaping and patching operation. The repairing device comprises a liquid tank, a sand mixing pry, high-pressure pumping equipment, coiled tubing equipment, a hydraulic spray gun and wellhead equipment, a stop valve is arranged between the liquid tank and the high-pressure pumping equipment, and the hydraulic spray gun and the coiled tubing penetrate through the wellhead equipment and extend into a shaft. According to the method, the hydraulic spray gun is firstly used for perforation operation, and the perforation cavity is formed at the deformation point, so that the extrusion acting force of a stratum on the casing is eliminated, the expansionary force required by casing shaping is greatly reduced, and the problem of repairing the deformed casing under the working conditions of high confining pressure and high ground stress is solved.

The button cell top cover assembly comprises the top cover assembly, the top cover assembly comprises an annular cover plate and a pole column, an annular insulating layer is arranged between the annular cover plate and the pole column, the annular cover plate comprises an inclined cover plate, the inclined cover plate is designed to be inclined downwards, and the annular insulating layer is arranged between the inclined cover plate and the pole column. An inclination angle alpha is formed between the inclined cover plate and the horizontal direction and ranges from 5 degrees to 15 degrees; according to the button cell top cover assembly and the lithium battery provided by the utility model, part or all of the annular cover plate is designed to be inclined downwards, so that expansive force is decomposed and expansive force in the vertical direction is inhibited, thus the reserved space is reduced, and the energy density is improved.

The application relates to the technical field of lithium batteries, and discloses a pole piece, a single battery and a pole piece manufacturing method. The pole piece comprises a plurality of foils, a plurality of first coating layers and a plurality of second coating layers. The plurality of foils are arranged at intervals, one side or both sides of the foils are provided with the first coating layers, and the second coating layers are arranged between adjacent foils to form a pole piece with a non-continuous foil structure. The second coating layers can provide a partial lithium deintercalation space between adjacent foils, and can effectively reduce the expansion degree of the pole piece in the first direction. Therefore, when the pole piece is used to manufacture an electric core, partial expansion reserved space can be released, the battery energy density can be improved, and in addition, the expansion force transmitted to the outside by the electric core can be effectively weakened, so that the safety is improved. The single battery with the pole piece also has the above advantages.

The utility model relates to wood door technical field discloses a kind of multifunctional anti-deformation wooden doors, including multiple spliced door panels, multiple spliced door panels are attached, and wood protective panel is respectively pasted in the two sides of multiple spliced door panels.The utility model provides that the clamping groove of spliced door panel side wall and the side wall of anti-coming-off clamping block are designed to cooperate, anti-coming-off clamping block slides into clamping groove along inclined plane during installation, transverse extrusion force generated by wedge structure is used, adjacent door panel is tightly locked, extrusion force is decomposed into normal pressure perpendicular to the wall of clamping groove, prevent door panel transverse displacement, while allowing small thermal expansion and contraction deformation, avoid stress concentration to lead to cracking, polyurethane foam strip in anti-deformation clamping frame inner wall has elasticity, can buffer the expansion force generated by humidity change of door panel, wear-resistant rubber pad on outside is closely attached to door panel surface, inhibit door panel warping by friction force, while reducing the direct friction loss between clamping frame and door panel.

The utility model discloses an electrical equipment pipeline pre-embedding device, which belongs to the field of power-taking pre-embedded sockets for electrical equipment, and comprises a pre-embedded box body, a socket panel is arranged on one side of the pre-embedded box body, and screw connecting columns are fixedly connected to two sides of the inner wall of the pre-embedded box body. A cable metal pressing piece is arranged between the two screw connecting columns, stamping grooves are further formed in the two ends of the cable metal pressing piece, an extrusion elastic piece is fixedly connected to one side of the inner wall of each stamping groove, and one end of each extrusion elastic piece is bent towards the side corresponding to the outer wall of the corresponding screw connecting column. The embedded box body is provided with the cable metal pressing sheets, so that after the cable metal pressing sheets are clamped, a binding and limiting structure specially aiming at the coiled and bent cable is formed between the cable metal pressing sheets and the embedded box body, the coiled and bent cable is prevented from expanding and loosening in the embedded box body, the expansion force is reduced, and the convenience of mounting the socket panel on the embedded box body is improved.

The application discloses a battery charging method, a battery and an electric energy device. The charging method comprises the following steps: in a battery charging process, when a state of charge (SOC) of the battery reaches a first SOC range, in a range from a minimum boundary value of the first SOC range to a first set SOC, a charging rate of the battery is adjusted to decrease from a first charging rate to a second charging rate, and in a range from the first set SOC to a maximum boundary value of the first SOC range, the charging rate of the battery is adjusted to increase from the second charging rate to the first charging rate or a third charging rate. In the first SOC range, the battery is charged at a lower charging rate when being close to the first set SOC, so that the expansion force of the battery is reduced, and the service life of the battery is prolonged.

The present application provides a negative electrode active material including a core and a coating layer coating the core, wherein the core is graphite, the coating layer comprises at least one of titanium carbide (TiC), tungsten carbide (WC), chromium carbide (Cr3C2), boron carbide (B4C) and silicon carbide (SiC), and the weight ratio of the coating layer to the graphite is (0.01-0.10):1.

A wafer pad structure and a method for forming the same, wherein the wafer pad structure comprises: a first substrate; a pad structure located on the first substrate, wherein the top angle between the top surface and the side wall of the pad structure is a rounded angle; and a passivation layer located on the pad structure, wherein the passivation layer has a passivation opening, wherein the passivation opening exposes the top surface of the pad structure. The top angle between the top surface and the side wall of the pad structure is a rounded angle, and in the subsequent thermal process of packaging, the rounded structure can well disperse and reduce the stress generated by thermal expansion of the pad structure, thereby reducing the risk of cracks in the passivation layer covering the pad structure due to stress concentration. This can reduce the contact of external water vapor with the pad structure through the cracks, thereby improving the performance of the semiconductor structure finally formed.