8915 results about "Current collector" patented technology

The present disclosure is to provide a cylindrical secondary battery that facilitates connecting a busbar by having both positive and negative electrodes on one side, and that has highly reliable electrical contact between an electrode assembly and a case. To that end, the present disclosure provides a secondary battery comprising: an electrode assembly; a case for housing the electrode assembly; a current collector plate welded to the electrode assembly and case; and a cap plate, located above the current collector plate, for sealing the case.

A cylindrical secondary battery including an electrode assembly including a negative electrode plate and a positive electrode plate; a cylindrical can accommodating the electrode assembly and including a terminal hole in one side of the cylindrical can and an open inlet in another side of the cylindrical can; a terminal coupled to the cylindrical can through the terminal hole; and a negative electrode current collector in the cylindrical can and electrically connecting the cylindrical can to the negative electrode plate. The negative electrode current collector includes a notch groove or a cutting hole configured to be cut in response to an increase in pressure in the cylindrical can.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, the electrode assembly comprises a positive pole piece and a negative pole piece, the positive pole piece comprises a positive current collector and a positive film layer, the positive film layer comprises a positive active material, the positive active material comprises lithium-containing phosphate of an olivine structure, and the electrolyte is a lithium-containing lithium-containing phosphate of a lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing lithium-containing electrolyte. The resistance of the positive pole piece is 0.1 ohm to 30 ohm, the negative pole piece comprises a negative current collector and a negative film layer, the resistance of the negative pole piece is 0.001 ohm to 0.01 ohm, the electrolyte comprises an organic solvent, the organic solvent comprises a chain ester solvent, and the mass content of the chain ester solvent in the organic solvent is 5% to 75%; the conductivity of the electrolyte at room temperature is 13 mS / cm to 20 mS / cm. The heat production amount of the battery monomer can be reduced, and the use reliability and the cycle performance of the battery monomer can be improved.

A battery includes an electrode assembly having a first uncoated portion and a second uncoated portion; a housing having an open portion formed at one side and configured to accommodate the electrode assembly through the open portion; a first current collector coupled with the first uncoated portion and located inside the housing; a cap configured to cover the open portion; and a spacer. The spacer includes a spacer portion interposed between the first current collector and the cap and configured to prevent movement of the electrode assembly, a gasket portion interposed between the housing and the cap and configured to seal the gap between the cap and the housing, and a connection portion configured to connect the spacer portion and the gasket portion and having a bending portion configured to switch an extension direction thereof between the spacer portion and the gasket portion.

A secondary battery includes: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a can accommodating the electrode assembly, a lower end of the can being open and being electrical connected to the second electrode plate; a first current collector plate between a top surface of the electrode assembly and the can and electrically connected to the first electrode plate; and a terminal part passing through a top surface of the can, a lower end of the terminal part being electrically and mechanically coupled to a top surface of the first current collector plate. A terminal liquid injection hole, through which an electrolyte is injected, extends through the terminal part.

A positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, where the positive electrode active material layer includes a first positive electrode active material represented by chemical formula (1) and a second positive electrode active material represented by chemical formula (2): Li1+xAaFeyMnzTivPO4−wSw (1), and Li2+rNasM1+qO2+t (2); and the positive electrode plate satisfies: 5.2≤R / Q≤13.5. Such a positive electrode plate can achieve a high specific discharge capacity of the electrochemical apparatus, thereby increasing energy density of the electrochemical apparatus. In addition, a relationship between compacted density R and single surface density Q of the positive electrode plate is limited, effectively improving cycling stability and rate performance of the electrochemical apparatus.

A positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, where the positive electrode active material layer includes two respective positive electrode active materials represented by chemical formula (1) and chemical formula (2): Li1+xNaaCo1+yAlzMgpTiuMvO2+w (1), where in chemical formula (1), M includes at least one of Zr, La, or Y, −0.1<x<0.1, 0<a<0.005, −0.05<y<0.05, 0.01<z<0.05, 0.001<p<0.01, 0<u<0.005, 0<v<0.005, and −0.05<w<0.05; and Li2+rNasN1+qO2+t (2), where in chemical formula (2), −0.2<r<0.2, 0≤s≤0.05, −0.1<q<0.1, −0.05<t<0.05, and N includes at least one of Ni, Cu, Mn, Fe, or Co. Such a positive electrode plate can achieve a high specific discharge capacity of the electrochemical apparatus, thereby increasing high-temperature cycling performance and energy density of the electrochemical apparatus.

Embodiments relate to a cylindrical secondary battery. A cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate, a case that accommodates the electrode assembly and of which a lower end is opened to be electrically connected to the second electrode plate, a first current collector plate disposed between a top surface of the electrode assembly and the case and electrically connected to the first electrode plate, a terminal which passes through a top surface part of the case and of which a lower end is electrically and mechanically coupled to a top surface of the first current collector plate, and a cap plate configured to seal a lower end of the case. The terminal includes a main body having a flat top surface and a welding groove recessed downward from a top surface of the terminal outside the main body.

The invention provides an all-solid-state battery, a preparation method thereof and electric equipment. The all-solid-state battery comprises a positive plate, a negative plate and an electrolyte layer positioned between the positive plate and the negative plate, the positive plate comprises a positive current collector layer and a positive active material layer, one side of the positive active material layer is coated with an insulating layer at an interval, and the circumferential edge of the negative plate is in lap joint with the insulating layer. The all-solid-state battery can improve the insulation performance in the using process, and the effect of reducing the risk of short circuit is achieved.

The invention provides a secondary battery, a preparation method thereof and an electric device. The secondary battery comprises a copper foil, the copper foil comprises copper crystal grains with different particle sizes, the copper crystal grains comprise copper crystal grains with the particle size smaller than or equal to 0.5 mu m and copper crystal grains with the particle size larger than 0.5 mu m, the number of the copper crystal grains with the particle size smaller than or equal to 0.5 mu m accounts for 70%-95% of the total number of the copper crystal grains, and the number of the copper crystal grains with the particle size larger than 0.5 mu m accounts for 10%-20% of the total number of the copper crystal grains. And the amount of the copper grains with the grain size larger than 0.5 mu m accounts for 5%-30% of the total amount of the copper grains. The current collector has excellent mechanical strength and plasticity.

A cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and having a lower end that is open and electrically coupled to the second electrode plate; a first current collector plate between a top surface of the electrode assembly and the case and that is electrically connected to the first electrode plate; a terminal passing through a top surface of the case and including a lower end electrically and mechanically coupled to a top surface of the first current collector plate; and a cap plate configured to seal the lower end of the case. The terminal includes a lower terminal including a welding groove having a depth from a top surface of the terminal in a downward direction; and an upper terminal in the welding groove of the lower terminal.

Embodiments described herein relate generally to systems and methods for continuously and / or semi-continuously manufacturing semi-solid electrodes and batteries incorporating semi-solid electrodes. In some embodiments, the process of manufacturing a semi-solid electrode includes continuously dispensing a semi-solid electrode slurry onto a current collector, separating the semi-solid electrode slurry into discrete portions, and cutting the current collector to form a finished electrode.

To an electrode manufacturing method capable of suppressing edge cracking of the coating portion in an intermittent coating type electrode.SOLUTION: The electrode manufacturing method includes: a coating step of intermittently applying electrode mixture slurry onto the current collector foil to form a coated area where the electrode composite layer is formed and an uncoated area where the electrode layer is not formed; and a drying step of drying the electrode mixture slurry. The uncoated area is cooled in the drying step.SELECTED DRAWING: Figure 2

A slidable current collector has frame formed as central substrate and sloped shoulders on opposing lateral sides of the central substrate. Electrical terminals pass through orifices arranged in at least two rows within the central substrate. At least one bumper is disposed on an underside of the central substrate between the at least two rows. During sliding on a power rail, the electrical terminals contact a rail surface, and the current collector can shift laterally on the rail surface across a distance between the bumper and one of the sloped shoulders. If disengagement of the electrical terminals from the rail surface occurs, angles on the sloped shoulders and the at least one bumper resist excessive lateral shifting and urge the electrical contacts to reengage with the rail surface.

Disclosed in the present application are an electrode assembly, a battery and an electric device. The electrode assembly comprises a positive electrode sheet and a negative electrode sheet, wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer located on at least one side of the positive electrode current collector; the negative electrode sheet comprises a negative electrode current collector and two insulating coatings arranged on the surface of the negative electrode current collector close to the positive electrode sheet, the distance between the two insulating coatings is larger than the width of the positive electrode active material layer, and the two insulating coatings do not face the positive electrode active material layer; and each of the insulating coatings comprises an insulating filler and a binder, and has a density greater than or equal to 20%. The electrode assembly provided by the present application enables the battery to have a high reliability and good cycle performance.

A positive electrode sheet, a secondary battery (4), and an electric device (5). The positive pole piece comprises a positive current collector; the bottom coating is positioned on at least one side of the positive current collector and comprises a conductive agent and a binder; the positive electrode active material layer is positioned on one side, far away from the positive electrode current collector, of the bottom coating layer and comprises a positive electrode active material; the thickness of the bottom coating layer is marked as L, and the thickness of the bottom coating layer meets the formula (I); wherein Dv50 is the corresponding particle size when the cumulative particle size distribution number of particles in the volume distribution of the positive electrode active material reaches 50%, and the unit is [mu] m; pD represents the compaction density of the positive pole piece, and the unit is g / cm < 3 >. # imgabs0 #

The invention relates to an electrode preparation method, an electrode prepared by the method, an energy storage device comprising the electrode and an electrode production system for carrying out the method. The preparation method comprises the following steps: (a) providing a self-supporting electrode film which comprises a first side and a second side opposite to the first side, and the second side comprises a to-be-deposited area on which metal is deposited when the self-supporting electrode film is in contact with an electrolyte for an electrodeposition reaction; (b) providing an electrolyte containing a salt of a metal to be deposited; and (c) contacting at least the region to be deposited of the second side of the self-supporting electrode film with the electrolyte, and performing an electrodeposition reaction in the region to be deposited, thereby depositing a current collector of the metal to be deposited on the second side, where the electrodeposition temperature is 0 to 70 DEG C. According to the electrode prepared by the method disclosed by the invention, the active substance in the electrode has excellent first discharge specific capacity, first coulombic efficiency and cycle performance.

The preparation method comprises the following steps: S1, mixing a hydrochloric acid solution with organic sodium sulfonate, then adding aniline and water, stirring and dissolving, then adding an oxidizing agent to carry out doping reaction, and carrying out suction filtration, washing, drying and grinding on a reaction product to obtain sodium-modified polyaniline; s2, uniformly mixing a negative electrode active material, a conductive agent and polytetrafluoroethylene, and then adding sodium polyaniline and an organic sodium supplement agent in a nitrogen or inert atmosphere for fibration treatment to obtain fibration powder; and S3, performing hot pressing on the fiberized powder onto the current collector to obtain the lithium ion battery. The prepared pre-sodium-modified negative electrode dry-method electrode has relatively good peeling strength and pole piece flexibility, and the condition that a traditional wet-method thick electrode is easy to crack is relieved; meanwhile, the dry-method electrode subjected to sodium modification treatment can induce uniform deposition of sodium ions, so that the dynamic performance of the whole sodium battery is improved, the problem of cyclic sodium precipitation is avoided, and the service life of the battery is further prolonged.

The invention provides a positive pole piece, a preparation method thereof and a sulfide all-solid-state battery. The positive pole piece comprises a positive current collector and a positive material layer arranged on the surface of the positive current collector, the positive electrode material layer comprises a modified positive electrode active material, an antioxidant, a sulfide electrolyte material, a conductive agent and a positive electrode binder, the modified positive electrode active material comprises an inner core and an oxide coating layer arranged on the surface of the inner core, and the inner core is a lithium-containing positive electrode active material. When the positive electrode plate containing the antioxidant and the modified positive electrode active material provided by the invention is applied to the sulfide all-solid-state battery, the synergistic effect of the antioxidant and the modified positive electrode active material can be exerted, so that the rate capability and the cycling stability of the sulfide all-solid-state battery are improved.

A positive electrode sheet, a secondary battery, and an electric device. The positive electrode sheet comprises a positive electrode current collector, a positive electrode active material layer located on at least one side of the positive electrode current collector, and a base coating located between the positive electrode current collector and the positive electrode active material layer; the base coating comprises an additive, and the additive comprises a compound containing at least one group among a carboxylic acid group, a phosphate group, and a fluoro group. The provision of the base coating between the positive electrode current collector and the positive electrode active material layer can effectively reduce corrosion of an electrolyte to the positive electrode current collector. Moreover, the additive comprised in the base coating contains at least one group among the carboxylic acid group, the phosphate group, and the fluoro group and thus the additive can effectively complex and / or capture free aluminum ions, so that the effect of protecting the positive electrode current collector can be further achieved, and free aluminum ions can be prevented from migrating to a negative electrode, thereby avoiding damage to an SEI membrane by the free aluminum ions.

The invention provides a current collector, a pole piece, a secondary battery, an electric device, a copper foil and a preparation method of the copper foil. The current collector comprises a copper foil, the average particle size of crystal grains in the copper foil is 50-400 nm, and based on the total number of the crystal grains in the copper foil, the number ratio of the crystal grains of the nano twin crystals is larger than or equal to 60%. Under the combined action of the high-proportion nano twin crystal structure and the small grain size, the mechanical strength of the current collector is improved while the high plasticity of the current collector is maintained, and a material basis is provided for further improvement of the energy density and the safety of the battery.

The invention provides a pole piece and a manufacturing method thereof, a rolling system and a secondary battery, and the manufacturing method of the pole piece comprises the following steps: coating slurry on a current collector and drying to obtain a dried pole piece; the difference between the thickness of the dried pole piece and the preset thickness after rolling is used as the total rolling reduction; the dried pole piece is subjected to continuous multi-stage rolling, adjacent two-stage rolling is carried out, the percentage of the rolling reduction of the previous-stage rolling in the total rolling reduction is larger than or equal to the percentage of the rolling reduction of the next-stage rolling in the total rolling reduction, and the sum of the rolling reduction of all stages of rolling is equal to the total rolling reduction; in the multi-stage rolling, the rolling reduction of each stage of rolling is gradually reduced on the whole; and the multi-stage rolling is cold pressing. According to the manufacturing method of the pole piece, the multi-stage rolling mode is adopted, the rolling reduction decreasing and roller gap adjusting mode is adopted, the diameter, roughness and hardness of the roller body are combined to adapt to different rolling reduction, and finally the consistency of stress release and the pole piece is achieved.

The invention discloses a lithium ion secondary battery and a power utilization device. A negative pole piece of the lithium ion secondary battery comprises a negative current collector, a positive pole piece and a negative pole piece, the negative electrode active material layer is located on at least one side of the negative electrode current collector, the negative electrode active material layer comprises a first negative electrode active material layer and a second negative electrode active material layer which are arranged in a stacked mode, and the second negative electrode active material layer is located on the side, away from the negative electrode current collector, of the first negative electrode active material layer; the number ratio of the secondary particles in the first negative electrode active material is greater than the number ratio of the primary particles in the first negative electrode active material; the number ratio of the secondary particles in the second negative electrode active material is greater than the number ratio of the primary particles in the second negative electrode active material, and the number ratio of the secondary particles in the second negative electrode active material is greater than the number ratio of the secondary particles in the first negative electrode active material; the oil absorption value of the second negative electrode active material is greater than that of the first negative electrode active material. Therefore, the lithium ion secondary battery has relatively excellent quick charge performance and relatively low volume expansion rate.

The invention relates to the technical field of batteries, in particular to a negative plate and a lithium ion secondary battery. The negative plate comprises a negative current collector and a negative active material layer positioned on at least one side surface of the negative current collector; the negative electrode active material layer comprises a first coating close to the negative electrode current collector and a second coating deviating from the negative electrode current collector; the thickness of the negative plate is 30-1000 [mu] m; the first coating comprises a first negative electrode active substance, the second coating comprises a second negative electrode active substance, and the second negative electrode active substance comprises a second graphite material and hard carbon; the ratio of the average particle size of the second negative electrode active material to the average particle size of the first negative electrode active material is L, 1lt; l < = 2.5; the outer surface of the negative electrode active material layer has a recess. The negative plate disclosed by the invention has excellent lithium ion conduction capability and capacity exertion, and the lithium ion secondary battery comprising the negative plate disclosed by the invention has relatively high energy density and rapid charging capability.

The invention discloses a plug-in circuit breaker power supply device of a power distribution box, and particularly relates to the technical field of power distribution boxes, the plug-in circuit breaker power supply device comprises an insulating frame body, a regulation and control assembly is arranged on the insulating frame body, the regulation and control assembly comprises a central partition plate arranged in the insulating frame body, and a plurality of current converters are plugged on the central partition plate; supporting insulating frames are arranged on the two sides of the bottom of the center partition plate. The first conductive connecting strip, the second conductive connecting strip and the current collector are rapidly separated in a rotating rod deflection mode, the insulation performance is effectively ensured, rapid opening and closing are easy, the second conductive connecting strip can make contact with the third conductive connecting strip, the signal conversion and transmission function is achieved, and the service life is prolonged. And the fourth conductive connecting strip can transmit a current signal on the current frequency converter to the other current collectors after being transferred by the fourth conductive connecting strip, and each structure realizes a rapid opening and closing current conversion mode, so that the insulation performance of the device during use can be effectively ensured.

The invention belongs to the technical field of batteries, and particularly relates to an electrode assembly, a preparation method thereof, a battery and a power utilization device. The electrode assembly comprises a pole piece, the pole piece comprises a current collector, an active layer and a tab, the active layer is arranged on at least one side of the current collector in the thickness direction, and the tab is arranged on one side of the current collector in the height direction; the liquid absorption capacity of the active layer is gradually reduced from one side of the current collector provided with the tab to the other opposite side of the current collector and from the current collector to the direction deviating from the current collector. According to the embodiment of the invention, the electrolyte wettability of the electrode assembly can be effectively improved by carrying out gradient / gradual change design on the liquid absorption capability of the electrode assembly in the specific direction.

The invention discloses an electrode assembly and a battery. The electrode assembly comprises a plurality of pole pieces and an isolating membrane arranged between two pole pieces with opposite polarities, and at least one pole piece is provided with a plurality of first convex parts; the pole piece comprises a current collector and an active material layer arranged on the surface of the current collector, the first convex part is formed by bending a part of the current collector and a part of the active material layer towards the same side of the pole piece, the height of the first convex part is H1, and H1 is more than or equal to 20 microns and less than or equal to 80 microns; the active material layer comprises a softener, the softener is selected from at least one of organic silicon, fatty acid salt and quaternary ammonium salt, based on the total weight of the active material layer, the weight percentage of the softener is A, and A is larger than or equal to 0.01% and smaller than or equal to 0.4%. In the application, the softening agent is added into the active material layer to improve the overall flexibility of the pole piece 300, so that the active material layer at the first convex parts does not generate microcracks while the height of the first convex parts is higher, further, an electrode assembly capable of meeting the use requirements can be conveniently processed, and the electrolyte infiltration effect is improved.

A slidable current collector has an array of terminals with carbon brushes for contacting conductor rails to deliver electrical power to a moving work machine. The terminals have upper sections with a conductive post, lower sections that include a reservoir of liquid metal, and bladders that connect the upper sections with the lower sections. Magnets surround outer shells of the terminals. Fluid above a threshold pressure fed into the bladders holds the upper sections apart from the lower sections and forces the magnets away from the conductor rails. Fluid below the threshold pressure allows the magnets to clamp the terminals to the conductor, lowers the conductive post into the liquid metal, and urges the carbon brushes against the conductor rails. The bladders provide a fluid suspension distributed across the array of terminals, enabling consistent electrical contact and wear for the carbon brushes.

The invention discloses a negative pole piece and a preparation method thereof, a bipolar pole piece and a preparation method thereof, a battery and an electric device. The negative pole piece comprises a first current collector and a second current collector, wherein the first current collector comprises a first side and a second side which are opposite to each other; the first active material layer and the second active material layer are sequentially arranged on the first side in the direction away from the first current collector, the first active material layer comprises metal lithium, and the second active material layer comprises metal lithium alloy. By adopting the negative pole piece or the bipolar pole piece, the problems of continuous thickening of an SEI film, continuous growth of lithium dendrites, lithium death, penetration of the lithium dendrites to a diaphragm and the like can be avoided, so that the cycle stability of a battery applying the negative pole piece or the bipolar pole piece is favorably improved.

The invention discloses a negative plate and a preparation method thereof, a battery and electric equipment. The negative plate comprises a current collector, a first coating and a second coating. Wherein the first coating and the second coating comprise active substances, the D50 particle size of the active substance of the first coating is greater than the D50 particle size of the active substance of the second coating, the D50 particle size of the active substance of the first coating is 5-12 [mu] m, and the D50 particle size of the active substance of the second coating is 1-7 [mu] m. According to the negative plate provided by the invention, the compaction density of the negative plate is improved, the energy density of the battery is improved, contact sites between active substances and between the active substances and the current collector are increased, and the hierarchical charge-discharge rate performance of the battery is improved. And meanwhile, the second coating is arranged on one side of the contact diaphragm, so that the short circuit condition caused by the morphology hardness of an active substance of the second coating can be effectively reduced, the process yield is improved, and the service life of the battery is prolonged.