7results about How to "High capacity density" patented technology

This utility model relates to the field of cylindrical battery technology and proposes a lithium-ion cylindrical secondary battery, including a housing, a gasket, and a rubber ring. The housing has a protrusion inside; the gasket is disposed inside the housing and abuts against the bottom side of the protrusion; the rubber ring is fixedly disposed on the positive electrode cap and spaced above the gasket, with a minimum distance H between the gasket and the rubber ring. 41 The end face radius of the lithium-ion cylindrical secondary battery is R1, H 41 / R1 = 3.6% - 5.5%. This utility model, by reasonably setting the distance between the gasket and the rubber ring, not only makes the gasket more compact with the positive electrode cap and rubber ring, improving the battery capacity and energy density, but also avoids interference and collision between the gasket and the positive electrode cap and rubber ring during assembly, reducing the assembly difficulty of the battery and thus effectively improving the overall performance of the battery.

The utility model relates to the technical field of batteries, in particular to a collector plate, a cover plate assembly and a cylindrical battery. The collector plate comprises a plate body and a connecting part, a connecting groove is formed in the plate body, one end of the connecting part is connected into the connecting groove, the connecting part has a first bending state and a second bending state relative to the plate body, when the connecting part is in the first bending state, the connecting part is separated from the connecting groove, and when the connecting part is in the second bending state, the connecting part is separated from the connecting groove. And when the connecting part is in the second bending state, the connecting part can be completely accommodated in the connecting groove. And the connecting part is configured to be capable of being bent towards the direction close to the tray body, so that the connecting part is converted from the first bent state to the second bent state. The cover plate assembly comprises the flow collecting disc. The cylindrical battery comprises the cover plate assembly. The current collecting disc and the cover plate assembly are light and thin in structure, and the cylindrical battery has higher battery capacity.

The invention discloses a flexible electrode film and a preparation method and processing equipment thereof, and belongs to the technical field of electrochemistry and environmental engineering. The thickness of the flexible electrode film is 40-1000 [mu] m, the flexible electrode film is provided with a fiberized three-dimensional network, an active material is adhered in the fiberized three-dimensional network, the interior of the flexible electrode film is also provided with a pore structure which is distributed with the fiberized three-dimensional network in a mutually interlaced manner, the pore structure is composed of a plurality of pores, and the pores are distributed in an interlaced manner. And the holes are in through or semi-through pore morphology. Soluble salt is introduced as a temporary structure regulation component, a uniformly distributed pore structure is formed in the electrode after subsequent removal, ion transmission conditions in the thick electrode are improved, and the utilization rate of active substances is increased. The fiberized three-dimensional network structure and a pore structure formed by salt pore forming cooperate with each other, so that the electrode achieves higher effective capacity and energy density in a unit area.

The present disclosure provides a soft package battery and an electric device, the soft package battery comprises a battery body and a protection plate, the battery body comprises an encapsulation body and an electrode core, the encapsulation body only comprises a main body part and an end part; the protection plate comprises a first surface and a second surface, the second surface is closer to the end surface of the main body part than the first surface, the first surface is farther away from the end surface of the main body part than the bending segment, the shortest distance between the first surface and the bending segment is D1, the shortest distance between the second surface and the end surface of the main body part is D2, 0.05mm≤D1≤1mm, 0.05mm≤D2≤0.5mm. Compared with the related art, the length space that is left after removing the unsealed part and the tab glue can be used by the electrode core body, and the battery capacity and energy density are improved by increasing the length of the electrode core main body.

The application discloses a kind of supercapacitor negative high-efficiency composite electrode and preparation method thereof, including the block body iron of substrate and the outer layer PrNi x Fe 1‑x O3 conductive active layer, and Fe2O3 active layer between the two, by wet chemical etching and transient high temperature joule heat method in-situ synthesis active layer, and further utilize wet chemical brush coating and transient high temperature joule heat method in-situ synthesis conductive active layer, two are asymmetric sandwich structure, it is favorable to build charge transport path, improve charge transport efficiency, at the same time, can effectively relieve the volume change generated in the process of charge and discharge of iron oxide, unlike the characteristics of particle composite structure easy to collapse, inhibit the occurrence of electrode material pulverization, wherein, using transient high temperature joule heat preparation technology, layered in-situ build heterostructure, not only simple and fast, also make the structure compact and dense, maintain the stability of overall electrode structure, improve the long-period cycle charge and discharge capacity of electrode.

This invention provides a thick electrode, its preparation method, and its applications. The thick electrode includes a current collector and at least two electrode layers located on the surface of the current collector. An electrospun layer is disposed between the electrode layers. The active material in the electrode layer closer to the current collector surface is a large-particle-size active material, while the active material in the electrode layer farther from the current collector surface is a small-particle-size active material. This invention improves the electrode loading and thickness by designing at least two electrode layers and optimizing the particle size distribution of the main active material in each layer, thereby increasing the specific capacity and energy density of the battery. Simultaneously, the electrospun layer connects the electrode layers, creating a porosity gradient distribution along the direction perpendicular to the electrode, constructing efficient ion diffusion and conduction channels and electron transport channels. This results in good ion diffusion and conduction, reduces polarization during charging and discharging, and ensures high energy density and power performance of the battery.

The invention discloses a preparation method and application of a cross-linked nanocellulose lithium battery binder, and belongs to the technical field of lithium ion battery binders. In the preparation process of the cross-linked nanocellulose lithium battery binder, a rigid crystalline nanobody TOCNF is introduced as a reinforcing phase, calcium citrate, citric acid or phytic acid is adopted as a green cross-linking agent, multiple hydrogen-bond interaction and a chemical cross-linked structure are synergistically formed in a system, and a stable three-dimensional network is constructed, so that expansion and cracking of a silicon-based electrode are effectively inhibited; the cycling stability and the capacity retention ratio are obviously improved; the plant-derived TOCNF is taken as a core and is matched with a green biodegradable cross-linking agent to construct a full-water-based system, toxic organic solvents are abandoned, and the method conforms to the concepts of environmental protection and circular economy. When the silicon-based lithium ion battery negative pole piece material is prepared, the TOCNF and the cross-linking agent are introduced to construct a synergistic three-dimensional network, and SBR elastic buffering is combined, so that SiOx volume expansion and pole piece cracking are effectively inhibited, and the cycling stability and the capacity retention rate of a silicon-based electrode are remarkably improved.