888results about "Nickel accumulators" patented technology

A battery cell, a battery, and an electrical device are described. The battery cell includes an electrode assembly. The electrode assembly is wound along a winding direction to form a jelly-roll structure containing a roll core cavity in a central region. The battery cell further includes a gel-state central column packed in the roll core cavity and formed by coagulation. The central roll core cavity formed by winding the electrode assembly is packed with the gel material that coagulates to form a gel-state central column. In this way, the central column can support the electrode assembly after coagulating in shape, thereby improving the deformation resistance of the electrode assembly, and reducing the risk of central collapse of the electrode assembly. In addition, when the electrode assembly is squeezed, the central column can serve as an elastic cushion to some extent.

The invention provides a nickel-metal hydride battery positive electrode material and a preparation method thereof, a nickel-metal hydride battery and electric equipment, the nickel-metal hydride battery positive electrode material is nickel-containing hydroxide doped with cobalt element and zinc element, the nickel-metal hydride battery positive electrode material comprises secondary particles composed of a plurality of primary particles, and the section porosity of the secondary particles is less than or equal to 3.0%. The nickel-metal hydride battery positive electrode material provided by the embodiment of the invention is doped with the cobalt element and the zinc element, attenuation of the capacity and the service life of the positive electrode material at high temperature can be slowed down through the doped elements, and the secondary particles are integrally of a compact structure, have few internal pores and are not easy to crack when bearing stress, so that the nickel-metal hydride battery positive electrode material is better in structural stability, and the service life is prolonged. And the cycle performance and the capacity retention ratio can be considered.

In order to solve the problem that the service life of a battery is short due to the fact that a zinc negative electrode of an existing nickel-zinc battery is easy to dissolve, the invention provides a negative electrode material for a zinc secondary battery, a preparation method of the negative electrode material, a negative electrode plate and a battery, and the negative electrode material for the zinc secondary battery comprises zinc oxide and a coating layer coating the surface of the zinc oxide, the coating layer comprises a polyethylene glycol-polyaniline copolymer.

The invention discloses an ejector rod supporting structure of an internal electrode of a nickel-hydrogen battery, and belongs to the technical field of batteries. The battery pack is arranged in the shell; the center rod penetrates through the battery pack, two ends of the center rod are respectively fixed on shell walls at two ends of the shell, and an elastic reset mechanism is arranged between the center rod and the shell and used for reducing shaking of the battery pack. The shell expands due to increase of internal pressure in the battery charging period, the center rod supports the two ends of the shell, and the battery pack is protected against damage.

To improve energy density of a secondary battery.SOLUTION: A method for manufacturing a secondary battery sequentially includes the steps of: preparing a case body having a first opening and a second opening facing each other; preparing an electrode body, the electrode body including a first electrode, a second electrode with a different polarity from that of the first electrode, a first electrode tab connected to the first electrode in a first end part, and a second electrode tab connected to the second electrode in a second end part, the first end part and the second end part being located on opposite sides; electrically connecting the first electrode terminal provided in the first sealing plate and the first electrode tab to each other; inserting the electrode body into the case body from the second end part through the first opening after electrically connecting the first electrode terminal and the first electrode tab; electrically connecting a second electrode terminal provided in a second sealing plate and the second electrode tab to each other after inserting the electrode body into the case body; sealing the first opening by the first sealing plate after inserting the electrode body into the case body; and sealing the second opening by the second sealing plate after electrically connecting the second electrode terminal and the second electrode tab with each other.SELECTED DRAWING: Figure 28

The pole piece comprises a pole piece body, the pole piece body comprises a dressing area and an empty foil area which are sequentially arranged along a first direction, the dressing area is provided with an active material layer, the empty foil area is provided with a diversion trench, and the diversion trench is used for circulating electrolyte. According to the application, the flow guide groove is formed in the empty foil area between the tab and the dressing area, and the flow guide groove can be used for circulating the electrolyte after the pole piece is wound, so that the diffusion rate of the electrolyte in the tab area is improved, and the manufacturing capability of liquid injection and aging procedures is improved.

Provided is a system and medical device that includes self diagnosing control switches. The control switch may be slidable within a slot in order to control activation of some function of the medical device. Due to natural wear and tear of movement of a control switch, the distances along the sliding slot that correspond to how much energy is used for the function may need to be adjusted over time in order to reflect the changing physical attributes of the actuator mechanism. The self diagnosing control switches of the present disclosures may be configured to automatically adjust for these thresholds using, for example, Hall effect sensors and magnets. In addition, in some cases, the self diagnosing control switches may be capable of indicating external influences on the controls, as well as predict a time until replacement is needed.

The invention discloses an elastic supporting structure of an internal electrode of a nickel-hydrogen battery. The elastic supporting structure comprises a shell; an electrode plate group is arranged in the shell; a first end plate and a second end plate are respectively arranged on two sides of the electrode plate group; a first limiting ring is arranged on one side, far away from the electrode plate group, of the first end plate; the first end plate abuts against the first limiting ring. A second limiting ring is arranged on one side, far away from the electrode plate group, of the second end plate; an elastic piece is arranged on the side, close to the second end plate, of the second limiting ring. The elastic piece is connected with the second end plate in an abutting mode. Bus bars are respectively arranged on the upper side and the lower side of the electrode plate group; external terminals are arranged on the left side and the right side of the shell; and the two external terminals are arranged in an up-down staggered manner and are respectively connected with the corresponding bus bars. Through cooperation of the first limiting ring, the second limiting ring, the first end plate, the second end plate and the elastic piece, the overall size and weight of the battery can be reduced under the condition that the energy density is not reduced.

A rechargeable electrochemical cell (10) comprises an anode compartment (14) and a cathode compartment (15), the compartments being enclosed in part by metal plates (11, 12) that define end faces of the cell (10), the two compartments (14, 15) being separated by an impermeable, ion-conducting electrolyte element (13). The cell (10) is a molten sodium / metal chloride cell, and the plate (12) enclosing the cathode compartment defines a slightly concave end face surrounded by a flat rim. The volume change of the cathodic materials as the cell is heated up to its operating temperature are accommodated by flattening of the concave end face, so the overall thickness of the cell (10) does not change.

The present disclosure relates to a self-supporting separator for an electrochemical device and an electrochemical device including the same, and relates to a self-supporting separator for an electrochemical device, which includes a negative electrode containing a silicon-based active material, wherein the self-supporting separator for an electrochemical device improves compression resistance, improves energy density, and exhibits high lifespan characteristics by adjusting the surface roughness Sa of the separator by adjusting the content and average particle diameter of the inorganic particles, and an electrochemical device including the same.

Provided is a versatile nonwoven fabric having excellent heat resistance and mechanical strength and applicable to applications requiring heat resistance; or a nonwoven fabric having excellent heat resistance, mechanical strength, and permeability. Moreover, provided is a separator for electrochemical elements having excellent heat resistance and mechanical strength. Furthermore, provided is a membrane support having excellent heat resistance, mechanical strength, and ion permeability.The nonwoven fabric of the present invention comprises a polymethylpentene component and a polyethylene component, wherein the polyethylene component is fused, and wherein the polymethylpentene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, and the polyethylene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric. The separator for electrochemical elements of the present invention comprises the nonwoven fabric. Another nonwoven fabric of the present invention comprises core-sheath composite fibers having a polyethylene component as a sheath component and a polymethylpentene component as a core component, wherein the polyethylene component as the sheath component of the core-sheath composite fiber is fused, wherein the polymethylpentene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, and the polyethylene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, wherein a thickness of the nonwoven fabric is 100 μm or less, and the nonwoven fabric has a direction with a tensile strength per mass per unit area of 2.0 N / 5 cm-width or more, or wherein a ratio (L / D) of a fiber diameter (D, unit: μm) to a length (L, unit: μm) of the core-sheath composite fiber is 350 or more. The membrane support of the present invention comprises the other nonwoven fabric.

The invention relates to an electrolyte and a preparation method thereof, a zinc-iron flow battery, a power utilization device and an energy storage device. The electrolyte comprises the following components: ferrous cyanide salt, alkali, a catalyst and water; the catalyst comprises a compound with the following structural formula: # imgabs0 #, wherein each R is respectively and independently 4-carboxyl phenyl, 4-sulfonyl phenyl, 4-aminophenyl or 4-phosphorous acid; m is iron (III), cobalt (II), manganese (II) or nickel (II). The electrolyte is beneficial to electron and proton transfer and can effectively reduce an electrochemical reaction energy barrier, so that the electrochemical reaction rate and the ionic conductivity are improved, the battery energy efficiency is improved, and the voltage loss is reduced.

There is provided an aqueous coating liquid having excellent storage stability and capable of forming a coating film with excellent water resistance. The aqueous coating liquid is an aqueous coating liquid for forming a coating film to be provided between a collector and an active material layer in an electrode for an electricity storage apparatus. This aqueous coating liquid contains: a water-based medium containing water; at least one polyvinyl alcohol (PVA)-based resin selected from the group consisting of unmodified polyvinyl alcohols and modified polyvinyl alcohols; an electrically conductive material; and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC). In addition, the aqueous coating liquid satisfies a condition that the aqueous coating liquid is free of polyacrylic acid, or that even when the aqueous coating liquid contains polyacrylic acid, the content of polyacrylic acid is less than 9% by mass based on the total mass of the aqueous coating liquid. Further, the ratio of the content of the PVA-based resin in the aqueous coating liquid to the content of PBTC in the aqueous coating liquid is 2 to 100.

The invention relates to an alkaline nickel-metal hydride battery. An electrode group of the alkaline nickel-metal hydride battery comprises a partition plate, a positive electrode and a negative electrode, the positive electrode is composed of a conductive positive electrode current collector and a positive electrode active layer coated on the surface of the positive electrode current collector, and the positive electrode active layer comprises a positive electrode active material and a positive electrode additive. The negative electrode is composed of a conductive negative electrode current collector and a negative electrode active layer coated on the surface of the negative electrode current collector, and the negative electrode active layer comprises a negative electrode active material and a negative electrode additive. The molar concentration of hydroxyl in the alkaline electrolyte of the alkaline nickel-metal hydride battery is 8-10 mol / L, and the alkaline electrolyte comprises sodium hydroxide with the molar concentration of 7-8 mol / L, lithium hydroxide with the molar concentration of 0-3 mol / L and potassium hydroxide with the molar concentration of 0-2 mol / L.

The embodiment of the invention discloses a secondary battery and electric equipment, the secondary battery comprises an electrode assembly, the electrode assembly comprises a plurality of first pole pieces and a plurality of second pole pieces, and the secondary battery comprises a first coating; the first coating comprises a plurality of first coating blocks, the plurality of first coating blocks are arranged on the surface, facing the second pole piece, of the first pole piece, a first channel is formed between any two adjacent first coating blocks, the first channel is at least communicated with one edge of the first pole piece, and the first channel exposes at least part of the surface, facing the second pole piece, of the first pole piece; the first coating is melted when the temperature is higher than a first preset temperature and at least partially covers the first channel, the area of the first pole piece covered by the first coating after melting is X1, the area of the first pole piece covered by the first coating before melting is Y1, and X1 is larger than Y1. According to the embodiment of the invention, the area of the first coating after melting is increased, so that heat generated by continuous contact reaction between the active particles of the first pole piece and the electrolyte can be slowed down, and the probability of thermal runaway of the secondary battery is reduced.

The invention provides a zinc negative electrode material, a zinc negative electrode and a nickel-zinc battery in order to solve the problem that an oxidation film generated by a negative electrode of a nickel-zinc battery in the prior art hinders electron conduction and influences electrochemical performance. The zinc negative electrode material comprises a negative electrode active material, the negative electrode active material comprises a zinc composite material, the zinc composite material has a core-shell structure, the core-shell structure comprises an inner core, a middle layer and a shell layer, the inner core is zinc powder, the middle layer coats the inner core, and the shell layer coats the middle layer. According to the zinc negative electrode material provided by the invention, the surface of the inner core zinc powder is coated with the middle layer, so that the effect of protecting the zinc powder is achieved, corrosion to the zinc powder is slowed down, and the basic performance of the zinc powder is maintained; besides, the surface of the middle layer is coated with the shell layer, the property of the surface of the zinc powder can be changed, meanwhile, the shell layer can cover hydrogen evolution reaction active sites on the surface of the middle layer, the shell layer can adjust the reduction potential of the zinc powder, the overall hydrogen evolution overpotential on the surface of the zinc powder is increased, the hydrogen evolution side reaction is reduced, and the stability of the electrochemical performance of the battery is guaranteed.

The invention relates to the field of perovskite type oxide materials, in particular to a transition metal doped perovskite type oxide and a preparation method and application thereof. The invention relates to a transition metal doped perovskite type oxide, the chemical general formula of which is LaFe1-xMxO3, M is at least one of Al, Co, Ni and Zn, and 0 lt; < = 0.3; the transition metal doped perovskite type oxide has a cubic perovskite structure, and a 3d orbit of B-site doped metal and a 2p orbit of O form covalent interaction through hybridization. According to the invention, the conductivity and electrochemical performance of the perovskite type oxide are improved, the problem of material agglomeration is solved by optimizing the preparation process, and a new solution is provided for the application of high-performance battery materials such as nickel-metal hydride batteries.

Aiming at the problems that the high-temperature stability of an existing nickel-zinc battery is reduced and the cycle life of the battery is shortened due to hydrogen evolution reaction or zinc corrosion, the invention provides the electrolyte for the nickel-zinc battery and the nickel-zinc battery thereof. The electrolyte for the nickel-zinc battery comprises a first additive and a second additive, the first additive comprises borate, and the second additive comprises one or two of villiaumite and chlorine salt. According to the electrolyte for the nickel-zinc battery provided by the invention, the first additive can form a barrier structure on a zinc negative electrode interface, and the first additive and the second additive are synergistic, so that the stability of the zinc negative electrode interface can be enhanced, a stable interface film is formed on the negative electrode interface, and side reactions such as hydrogen evolution reaction or zinc corrosion are inhibited; therefore, the cycle life of the battery is prolonged, and the high-temperature performance and the safety performance of the battery are improved.

There is provided an aqueous coating liquid having excellent storage stability and capable of forming a coating film with excellent water resistance. The aqueous coating liquid is an aqueous coating liquid for forming a coating film to be provided between a collector and an active material layer in an electrode for an electricity storage apparatus. This aqueous coating liquid contains: a water-based medium containing water; at least one polyvinyl alcohol (PVA)-based resin selected from the group consisting of unmodified polyvinyl alcohols and modified polyvinyl alcohols; an electrically conductive material; and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC). In addition, the aqueous coating liquid satisfies a condition that the aqueous coating liquid is free of polyacrylic acid, or that even when the aqueous coating liquid contains polyacrylic acid, the content of polyacrylic acid is less than 9′% by mass based on the total mass of the aqueous coating liquid. Further, the ratio of the content of the PVA-based resin in the aqueous coating liquid to the content of PBTC in the aqueous coating liquid is 2 to 100.

This application relates to the technical field of nickel-metal hydride secondary battery electrode materials, and specifically relates to a rare earth-magnesium-nickel-based hydrogen storage electrode material and a preparation method thereof. The present invention provides a rare earth-magnesium-nickel-based hydrogen storage electrode material that can improve the discharge characteristics of nickel-metal hydride secondary batteries at low temperatures. This material has an A5B 19 type superlattice structure, with the general formula M 1‑a Mg a Ni x Al y N z . In the X-ray diffraction pattern of this hydrogen storage material, the relative intensity of the maximum peak P1 appearing in the range of 2θ = 30.20° - 30.45° is greater than 4.00% and less than 10.00%. The relative intensity of the maximum peak P2 appearing in the range of 2θ = 31.45° - 31.75° is greater than 5.00% and less than 15.00%. In the range of 2θ = 31.45° - 33.00°, a broad signal is exhibited, and its maximum relative intensity is greater than 1.50% and less than 7.00%. The relative intensity of the maximum peak P3 appearing in the range of 2θ = 33.00° - 33.20° is greater than 2.00% and less than 10.00%. This material has a high discharge capacity at both room temperature and -30°C low temperature.

This secondary battery includes: an electrode assembly including a first electrode and a second electrode having a polarity different from a polarity of the first electrode; and an exterior package that accommodates the electrode assembly and an electrolyte solution, wherein the exterior package includes a first sealing plate and a second sealing plate disposed to face each other, the first sealing plate includes a first gas-discharge valve that discharges a gas in the exterior package to outside of the exterior package when pressure in the exterior package becomes equal to or more than a predetermined value, and the second sealing plate includes a second gas-discharge valve that discharges the gas in the exterior package to the outside of the exterior package when the pressure in the exterior package becomes equal to or more than a predetermined value. This secondary battery 1 has higher reliability.

The present disclosure relates to a battery system with adjustable heating rate and control method thereof, the battery system comprises a battery pack, a heating plate, a power control module, and a battery management system; when the temperature of the battery pack is lower than the preset self-heating switch-on temperature, the power control module is turned on, and the battery management system transmits the collected status information of the battery pack to the power control module, the power control module adjusting the current on-off time and switching frequency of the heating plate through a PWM signal to adjust the heating power and heating rate, to realize self-heating of the battery; when the temperature of the battery pack reaches the preset self-heating switch-off temperature, the power control module is turned off to stop heating; wherein, the power control module further includes a current adjustment module, a current acquisition module, and a heating control module. The present disclosure can realize the beneficial effects of fast heating rate, long driving range, and fast charging at low temperature of the power battery system.

The invention relates to a phosphate-based hydrogen ion battery and a preparation method thereof. The phosphate-based hydrogen ion battery comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, the battery negative electrode material contains phosphate or basic phosphate of Fe (II) / Fe (III), and the phosphate comprises the following chemical formula: Fe (III) (PO4) x (OH) 3-3x, where 0 lt; x < = 1; fe (II) (PO4) y (OH) 2-3y, wherein 0 lt; y < = 2 / 3. The electrolyte is an alkaline solution, and the pH is larger than or equal to 12. Compared with the prior art, the hydrogen ion battery has the advantages of low cost, high safety, high charge-discharge cycle index, long service life, wide use temperature range and the like.

The present invention relates to a phosphate-based hydrogen ion battery and a preparation method thereof, including a positive electrode, a negative electrode, a separator and an electrolyte; the negative electrode material of the battery contains phosphate or basic phosphate of Fe(II) / Fe(III), and the phosphate includes the following chemical formula: Fe(III)(PO4) x (OH) 3‑3x , where 0 < x ≤ 1; Fe(II)(PO4) y (OH) 2‑3y , where 0

An electrode assembly includes an electrode stack having a first electrode, a first separation layer, a second electrode and a second separation layer consecutively stacked, the electrode stack being wound around a winding axis in a winding direction, and a first electrode tab electrically connected to the first electrode, the first electrode tab protruding in an axial direction away from a first end of the first electrode. The second electrode includes a second electrode uncoated portion where an active material is not coated, the second uncoated portion being exposed at a second end of the second electrode in the axial direction, the second uncoated portion being configured to be a second electrode tab. A battery cell including the electrode assembly is also provided.

In order to solve the problems that in the prior art, a zinc negative electrode is prone to corrosion and zinc dendrite growth in the charging and discharging process, the zinc negative electrode comprises a negative electrode base material, a negative electrode active layer and a composite coating, the composite coating comprises a first coating and a second coating, the negative electrode active layer is arranged on the surface of the negative electrode base material, and the second coating is arranged on the surface of the negative electrode base material. The second coating is arranged on one surface, deviating from the negative substrate, of the negative active layer; the first coating is arranged on one surface, deviating from the negative active layer, of the second coating; the first coating comprises a first material, the second coating comprises a second material, the first material comprises an amide polymer and / or an amide non-polymer, and the second material comprises one or more of an ionic liquid material, a zinc phosphate material and a cerium oxide material. The surface of the zinc negative electrode is coated with the composite coating, so that multiple protection on the zinc negative electrode is formed, contact between zinc and electrolyte is effectively reduced, corrosion reaction and zinc dendrite growth are inhibited, and the cycle performance and safety of the nickel-zinc battery are improved.

The invention relates to the technical field of batteries, in particular to a single battery, a battery device and a power utilization device. The positive pole piece comprises a positive current collector and a positive film layer arranged on at least one surface of the positive current collector; the positive electrode film layer comprises a carbon nano tube and a tungsten element, and the carbon nano tube is located on the surface of the tungsten element; the positive electrode film layers sequentially comprise a first positive electrode film layer to an nth positive electrode film layer from the position close to the positive electrode current collector to the position far away from the positive electrode current collector, and n is a positive integer larger than or equal to 2; and the mass ratio of the tungsten element in each positive electrode film layer is gradually increased from the direction close to the positive electrode current collector to the direction far away from the positive electrode current collector. The battery monomer provided by the invention has the advantages of good quick charge capacity, high power and good cycle performance.

The utility model relates to the technical field of batteries, in particular to a nickel-metal hydride battery positive pole piece and a battery. The positive pole piece of the nickel-metal hydride battery comprises a base material, an active material area and a net position buffer area located on one side of the active material area are formed on the base material, a tab belt is welded to the net position buffer area, an insulating layer is pasted to the tab belt, the insulating layer at least covers part of the inner side edge of the tab belt in the width direction, and the outer side edge of the tab belt is provided with a gap between the active material area and the net position buffer area. And at least part of the net bit buffer area is covered. By adopting the mode, the stability of the battery can be improved.

Provided is a system for predicting a vent occurrence time of a battery cell, which includes a terrace portion having a sealing portion and provided on at least one side of a pouch type battery case and an electrode lead protruding from an end of the terrace portion, the system including a storage unit for collecting data about vent occurrence times according to widths of a remaining sealing portion, a measurement unit for periodically measuring a width of a remaining sealing portion of the battery cell to be measured, and a determination unit for predicting a vent occurrence time of the battery case to be measured by comparing a measured width of the remaining sealing portion with the collected data.

The present invention discloses a cylindrical low-pressure nickel-hydrogen battery, comprising a shell and a cap. A hydrogen storage material tube is arranged in the center of the shell, the hydrogen storage material tube is wrapped by the battery cell, and the lower end is in contact with the shell. The shell is the negative electrode of the power supply, and the cap is the positive electrode of the power supply. This technology solves the problems of high working hydrogen pressure, large volume and safety of nickel-hydrogen batteries, and at the same time realizes a battery structure that is easy to package, compact, highly thermally conductive, has a long service life, is low in cost and has a simple process.