245results about "Nickel accumulators" patented technology

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 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.

According to the membrane-free electrochemical energy storage device, in the thickness direction of a partition plate, a first energy storage device and a second energy storage device are arranged on the two sides of the partition plate correspondingly and connected with the partition plate; the first energy storage device comprises a first end plate, a first sealing gasket, a first current collector, a first gas diffusion electrode, a first porous membrane, a first auxiliary electrode, a second porous membrane, a first porous electrode, a second current collector and a second sealing gasket; the second energy storage device comprises a second end plate, a third sealing gasket, a third current collector, a second gas diffusion electrode, a third porous membrane, a second auxiliary electrode, a fourth porous membrane, a second porous electrode, a fourth current collector and a fourth sealing gasket; the metal strip is connected between the first auxiliary electrode and the second auxiliary electrode. Therefore, the membrane-free electrochemical energy storage device provided by the invention can perform short-term energy storage and can also perform long-term energy storage, and the energy storage effect and the energy storage cost can be both considered.

A manufacturing apparatus includes a chamber, a pressure reducing device, and a return pipe. The pressure reducing device is configured to reduce the pressure in the chamber. The return pipe includes a first opening, a conduit, and a second opening. The first opening and the second opening are respectively and independently open to the interior of the chamber. The first opening is connected to an exterior body. The conduit connects the first opening and the second opening. The conduit is configured to once draw gas in the exterior body out of the chamber when the pressure in the chamber is reduced, and return the drawn gas into the chamber.

To ensure easy permeation of an electrolyte solution into an electrode plate during the injection of the electrolyte solution.SOLUTION: A positive electrode plate 2 is configured so that: when a coating side surface 22a of a positive electrode mixture layer filling a positive electrode current collector 21 is divided into a plurality of regions including an upper region Wt1 and a lower region Wt3 in an up-down direction and, at an end part 22d of the positive electrode mixture layer, an average uneven width of the end part 22d of the positive electrode mixture layer in the upper region Wt1 is defined as an uneven width ΔW1 and an average uneven width of the end part 22d of the positive electrode mixture layer in the lower region Wt3 is defined as an uneven width ΔW3, uneven width ΔW1≤uneven width ΔW3 is satisfied. At the injection of the electrolyte solution, the electrolyte solution remaining at the bottom of an electrode group easily permeates from the end part 22d of the lower region Wt3.SELECTED DRAWING: Figure 7

The invention provides a current collector and a battery, which can reduce the weight of the current collector and the battery provided with the current collector while inhibiting the reduction of the conductivity of the current collector, and can inhibit the reduction of the thermal conductivity of the current collector. A current collector (100A) is provided with a support layer (110) and a conductive layer (120). The support layer (110) is configured from a resin composition having electrical insulating properties. The conductive layer (120) is laminated on the support layer (110). The conductive layer (120) is made of an alloy containing elemental magnesium, elemental aluminum, and elemental calcium.

The invention discloses a zinc-nickel battery cathode current collector and a preparation method thereof, and relates to the technical field of zinc-nickel secondary batteries. The negative current collector comprises a copper base material or a nickel base material and an electroplated layer arranged on the surface of the copper base material or the nickel base material, the electroplated layer comprises tin-bismuth alloy, the content of bismuth in the tin-bismuth alloy is 5-15 wt%, and the balance is tin. The tin-bismuth alloy electroplated layer is arranged on the surface of the current collector base material, so that the corrosion resistance and the conductivity of the negative current collector are effectively improved, the interface bonding force between the current collector and an active substance is improved, the cycling stability of the zinc-nickel battery is remarkably improved, and the technical problems that an existing current collector is easy to corrode in an alkaline electrolyte and the interface impedance is increased are solved. The preparation method can be widely applied to the field of preparation of negative current collectors of zinc-nickel secondary batteries and other alkaline secondary batteries.

To provide long and ultra-long duration energy storage systems.SOLUTION: There are provided a battery, a bulk energy storage system including the battery, and / or a method of operating the bulk energy storage system including the battery. The battery may include a first electrode, an electrolyte, and a second electrode, wherein one or both of the first electrode and the second electrode comprise direct reduced iron ("DRI"). The DRI may be in the form of pellets. The pellets may comprise at least about 60 wt.% iron by elemental mass, based on the total mass of the pellets. One or both of the first electrode and the second electrode comprises from about 60% to about 90% iron and from about 1% to about 40% of a component comprising one or more of materials selected from a group of SiO2, AI2O3, MgO, CaO, and TiO2.SELECTED DRAWING: Figure 1

The nickel-metal hydride storage battery box system comprises a storage battery box, an electric control box is arranged on one side of the storage battery box, a storage battery trolley is arranged in the storage battery box, idler wheels are arranged on the two sides of the storage battery trolley, a battery pack is arranged on the storage battery trolley, and a cantilever device is arranged in the storage battery box. The cantilever device comprises a main supporting track frame and an auxiliary supporting track frame, the main supporting track frame and the auxiliary supporting track frame are rotationally connected, when the auxiliary supporting track frame is unfolded, the auxiliary supporting track frame serves as a cantilever, the storage battery trolley can be conveniently pulled out, and after the auxiliary supporting track frame is folded, the storage battery trolley can be protected; according to the innovative cantilever device, when maintenance is needed, the unfolded auxiliary supporting track frame can serve as a stable cantilever, whole-course supporting and guiding are provided for drawing and pulling of the storage battery trolley, the storage battery trolley is effectively prevented from overturning or clamping stagnation, and operation is greatly facilitated.

The invention relates to the technical field of battery electrodes, and discloses a negative electrode coating preparation method, a negative electrode plate and a battery. According to the negative electrode coating preparation method, a zinc-based composite negative electrode plate is coated with colloid formed by taking ferric iron complex salt as an effective component; a protective film can be formed on the surface of the zinc-based composite negative pole piece in the charging and discharging process of the battery, and the protective film prevents a negative active substance from being dissolved in an electrolyte, slows down the rapid attenuation of the discharge capacity of the battery, prevents the negative pole piece from being in direct contact with the electrolyte, reduces gas production of the battery, enables zinc to be uniformly deposited and prevents zinc dendrites from being formed, so that the service life of the battery is prolonged. And the charge-discharge efficiency of the battery is improved under the condition of prolonging the cycle life.

The invention belongs to the technical field of batteries, and particularly relates to an electrolyte additive for a zinc-nickel battery with a long cycle life and an electrolyte. The electrolyte additive comprises indium oxide and a surfactant, the surfactant comprises sodium dodecyl benzene sulfonate, lauryl sodium sulfate and a fluorine-containing anionic-nonionic ampholytic surfactant, and the fluorine-containing anionic-nonionic ampholytic surfactant is prepared by the following steps: firstly, carrying out free radical addition on perfluorohexyl ethyl iodide and allyl polyoxyethylene ether; and then carrying out sulfonation reaction on the terminal hydroxyl of the addition product. The indium oxide and the surfactant prepared by the invention have a synergistic effect in the electrolyte, and the cycle life of the zinc-nickel battery at high and low temperatures can be improved at the same time.

The nickel-hydrogen battery module of the present application is provided with a bottom shell, a nickel-hydrogen battery pack and a connecting set. When it is needed to connect the nickel-hydrogen batteries in parallel, i.e. when it is needed to lead out the total positive electrode and the total negative electrode of the nickel-hydrogen battery module, each locking post on the busbar is correspondingly threaded through each through hole, and each locking nut is correspondingly screwed on the end of each locking post, thus completing the parallel connection of the nickel-hydrogen batteries and leading out the total positive electrode and the total negative electrode of the nickel-hydrogen battery module. The parallel connection can be realized without the aid of external tools, and the parallel connection operation is simple and convenient. In addition, even if an operation mistake occurs, each locking nut can be correspondingly unscrewed from the end of each locking post, thus facilitating disassembly.

A battery system with a large lithium-ion battery powers auxiliary devices by discharging battery cells distributed among multiple battery packs. The discharge of the battery cells is effectively controlled while maintaining the expected lifespan of the lithium-ion battery cells. Each battery pack internally supports a battery management system and can have identical components, thus supporting easy scalability to higher power / energy architectures. Battery packs can be added or removed without interfering with the user, wherein one of the battery packs serves as the master battery pack and the remaining battery packs serve as slave battery packs. When the master battery pack is removed, one of the slave battery packs becomes the master battery pack. The master battery pack and the slave battery packs coordinate the charging and discharging of the battery cells via a communication channel such as a Controller Area Network (CAN) bus.

An alkaline storage battery includes a positive electrode. The positive electrode includes a positive electrode mixture. The positive electrode mixture contains a nickel compound and a metal compound. The nickel compound is a positive electrode active material The metal compound is a compound of at least one metal element selected from the group consisting of titanium, niobium, tungsten, vanadium, molybdenum, zirconium, and tantalum. A ratio Wm / Wn of a mass Wm of the metal compound contained in the positive electrode mixture to a mass Wn of the nickel compound contained in the positive electrode mixture in terms of nickel hydroxide ranges from 0.2 / 100 to 5.0 / 100. The metal compound contains iron at a mass ratio ranging from 10 ppm to 10000 ppm. A ratio We / Wp of a mass We of the alkaline electrolyte to a mass Wp of the positive electrode mixture ranges from 0.35 to 1.0.

The utility model discloses a diaphragm and a battery, the diaphragm comprises a diaphragm main body and a polytetrafluoroethylene layer arranged on at least one side of the diaphragm main body, and the thickness of the polytetrafluoroethylene layer is 0.01-0.10 mm. In the embodiment, the polytetrafluoroethylene layer is arranged on the diaphragm main body, and the compact structure of the polytetrafluoroethylene layer is distributed on the surface of the diaphragm main body, so that the puncture resistance of the diaphragm main body is enhanced. Therefore, the diffusion of zincate ions can be effectively inhibited, and oxygen generated by the positive electrode during charging can be ensured to smoothly reach the zinc negative electrode for reduction reaction. Besides, due to the arrangement of the polytetrafluoroethylene layer, the diaphragm is endowed with certain hydrophobicity, so that the electrolyte is stably adsorbed in the diaphragm, and the service life of the battery is remarkably prolonged.

The invention relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power utilization device. The battery monomer comprises a positive pole piece, a negative pole piece and a separator, 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 positive electrode active material, and the positive electrode active material comprises an inner core layer and a shell layer at least partially coating the surface of the inner core layer; the inner core layer comprises lithium manganese iron phosphate, and the shell layer comprises a ternary positive electrode material; the average particle size ratio of the lithium manganese iron phosphate to the primary particles of the ternary positive electrode material is (1-500): 1 and is not equal to 1: 1. The battery monomer disclosed by the invention has excellent rate capability, cycle performance and safety performance.

The systems and methods of various embodiments can provide porous materials for electrodes of electrochemical energy storage systems.

This invention provides a nickel-metal hydride (NiMH) battery that suppresses cobalt deposition in a separator. The NiMH battery comprises a positive electrode, a negative electrode, a separator separating the positive and negative electrodes, and an alkaline electrolyte. The positive electrode has a positive electrode active material primarily composed of nickel hydroxide, and the positive electrode active material contains cobalt (Co). The negative electrode has a hydrogen storage alloy containing cobalt (Co) and manganese (Mn). In this NiMH battery, (weight of positive electrode Co × positive electrode porosity + weight of negative electrode Co × negative electrode porosity) / (weight of negative electrode Mn × negative electrode porosity) is 0.85 or more and 1.61 or less, the porosity of the separator is 64% or more, and the weight ratio of cobalt (Co) to manganese (Mn) in the negative electrode is 0.26 or less. Therefore, the deposition of cobalt in the separator can be suppressed by Mn, thereby suppressing the formation of Co-based conductive pathways.

The present disclosure provides a flat metal sheet having a principal surface located on one side along a thickness direction, a plurality of struts, and a node part where end portions of the plurality of struts are connected to one another, wherein the strut and the node part form a mesh structure, and the plurality of the struts are in close contact with each other, and a plurality of through holes penetrating the principal surface in the thickness direction.

A zinc battery 1 comprises an electrode group 10. The electrode group 10 comprises alternately layered negative electrodes 12 and positive electrodes 14. The negative electrodes 12 include negative electrodes A1–A3 as first through third negative electrodes counted from one end side in the layering direction of the negative electrodes 12 and the positive electrodes 14 of the electrode group 10, and the negative electrodes A1–A3 include negative electrode materials a11, a12, a21, a22, a31, and a32 that contain an active material that includes zinc, the mass of the active material of the negative electrode A2 being greater than the mass of the active material of the negative electrode A3.

The invention discloses a secondary battery. Provided is a high-capacity secondary battery. The secondary battery is provided with a positive electrode layer containing, as a positive electrode active material, at least one of a Ni-based hydroxide containing elemental nickel and a Ni-based hydroxide coated with Co, the Co-coated Ni-based hydroxide has a coating layer containing elemental cobalt on at least a portion of the surface of the Ni-based hydroxide, and the positive electrode layer contains, as an additive material, a first additive material containing elemental boron, or a mixed additive material containing elemental boron. The mixed additive material is a mixed material of the first additive material and a second additive material containing cobalt element.

Provided are a power storage device having high conduction reliability and a method for manufacturing the same. A power storage device (100) disclosed herein is provided with: an electrode body (20) including a first electrode (22); a housing (10); and a first electrode terminal (30) electrically connected to the first electrode (22) via a first conductive member (50). A case (10) is provided with: a bottomed cylindrical case body (12) having a bottom wall (12a) and an opening (12h) facing the bottom wall (12a); and a sealing plate (14) that seals the opening (12h) of the case body (12). The first electrode terminal (30) is attached to the bottom wall (12a) and has a through-hole (30h). The first conductive member (50) is inserted into the through hole (30h) and joined to the first electrode terminal (30).

The invention relates to the technical field of nickel-carbon batteries, in particular to a negative plate for a nickel-carbon battery and a preparation method and application thereof.The preparation method comprises the following steps that A, a porous current collector is prepared, carbon nanotubes are sputtered to the surface of the porous current collector through the magnetron sputtering technology, the carbon nanotubes are made to permeate into the porous current collector, and the porous current collector is prepared; the porous current collector permeated with the carbon nanotubes is obtained; and B, infiltrating negative electrode slurry into the porous current collector infiltrated with the carbon nanotubes by using a spraying process, compounding the negative electrode slurry with the pre-infiltrated carbon nanotubes, and drying to form a composite electrode coating, thereby obtaining the negative plate for the nickel-carbon battery. The preparation method of the negative plate for the nickel-carbon battery, provided by the invention, is simple and high in operability, and is beneficial to improving the energy density, the conductivity and the rate capability on the premise of ensuring the structural stability and the cycle life.

The utility model discloses a button cell device for in-situ electrochemical test, which comprises a shell, a positive plate, an isolation component and a negative plate, a cell inner cavity is formed in the shell, and a transparent observation window is arranged on the shell; the positive plate is provided with a positive observation hole; the isolation assembly comprises a diaphragm layer and a transparent blocking layer, a diaphragm through hole is formed in the diaphragm layer, and the transparent blocking layer is used for covering or blocking the diaphragm through hole; the active material layer of the negative plate faces the transparent observation window; the positive plate, the isolation assembly and the negative plate are sequentially stacked, and the transparent observation window, the positive observation hole and the diaphragm through hole are overlapped on the axial projection. Therefore, the behaviors of zinc dendrite growth and gassing side reaction of the active material on the negative plate can be observed in real time, so that a traditional button cell is transformed into a cell device suitable for in-situ electrochemical testing. In addition, the active materials of the positive plate and the negative plate can be prevented from being in direct contact through the transparent barrier layer, so that the problems of battery short circuit and the like are avoided.

The utility model discloses a pole piece and a battery cell, the pole piece comprises: an insulation substrate layer, which is a porous structure, is provided with a plurality of first through holes, and comprises a tab connection area and an active material support area; the conductive piece is arranged in the first through hole; the metal layer is connected to the tab connecting area, and the conductive piece is electrically connected with the metal layer; and the active material layer is connected to the active material supporting region. The pole piece disclosed by the utility model can have relatively high energy density.

The invention belongs to the technical field of batteries, and discloses a preparation method of a zinc-nickel secondary battery negative electrode active material. The preparation method comprises the following steps: adding ZnO into a KOH solution of saturated ZnO, uniformly mixing, adding Ca (OH) 2, reacting, and aging to obtain the negative active material of the zinc-nickel secondary battery. A hydrothermal coprecipitation method is adopted, used raw materials comprise calcium hydroxide, zinc oxide, potassium hydroxide and the like, and a calcium zincate crystal generated in the preparation process has a quadrilateral crystal form. The crystal form of calcium zincate can be effectively stabilized by controlling hydrothermal coprecipitation conditions. The solubility of the zinc oxide in an alkaline solution is low and is far lower than that of zinc oxide. And due to the characteristic, the concentration of zincate radicals in the electrolyte is remarkably reduced, so that the growth of negative electrode dendritic crystals is effectively inhibited, and the cycling stability and the service life of the zinc-nickel battery are further improved.

The invention relates to an easy-to-activate AB5 type multi-element doped modified hydrogen storage material and a preparation method and application thereof, the chemical general formula of the hydrogen storage material is LaxCeyNdzNiaFebMnc, x + y + z = 1, x is greater than or equal to 0.5, y is greater than or equal to 0 and less than or equal to 0.5, and z is greater than or equal to 0 and less than or equal to 0.5; a + b + c = 5, a > = 4, 0 < = b < = 1, 0 < = c < = 1, and at least two of y, z, b and c are not equal to 0. Compared with the prior art, the single-phase AB5 type hydrogen storage alloy with a hexagonal crystal form is prepared by synergistically replacing A site (La) by Ce / Nd and replacing B site (Ni) by Fe / Mn according to a specific proportion, the alloy has relatively high hydrogen storage capacity and rapid hydrogen absorption and desorption dynamic performance, the hysteresis of a hydrogen absorption and desorption platform is obviously improved, and rapid hydrogen absorption and the like can be completed without hydrogen absorption and desorption activation.

A positive electrode active material, a secondary battery, and an electric device. The positive electrode active material includes a secondary particle agglomerated by primary particles. In the SEM image of cross-section of the secondary particle, the number of grain boundaries per unit cross-sectional area is α line / µm2, the length of grain boundaries per unit cross-sectional area is β µm / µm2, and the secondary particle satisfies: 0.15 ≤ β / α ≤ 0.4. By adjusting the number of grain boundaries and length of grain boundaries, the stress release ability of material structure is enhanced, the oxygen stability of material is improved, and the cycle life of secondary battery is further extended and the performance of gas production and kinetic properties are improved.