522results about "Nickel accumulators" patented technology

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 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.

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 disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe2+ and Fe3+“green rusts related compounds”.

Provided is a hydroxide ion-conducting separator excellent in alkali resistance and capable of further effectively suppressing short circuiting caused by zinc dendrites. The LDH compound separator includes a porous substrate made of a high molecular material and a layered double hydroxide (LDH) compound that seals the pores of the porous substrate. The average porosity of the central portion in the thickness direction of the LDH compound separator is lower than the average porosity of the portion near the surface of the LDH compound separator.

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.

To provide an electrochemically active cathode material for a battery.SOLUTION: An electrochemically active cathode material includes a non-stoichiometric beta-delithiated layered nickel oxide. The non-stoichiometric beta-delithiated layered nickel oxide has a chemical formula. The chemical formula is LixAyNi1+a-zMzO2*nH2O. In the formula, x is approximately 0.02 to 0.20, y is approximately 0.03 to 0.20, a is approximately 0.02 to 0.2, z is approximately 0 to 0.2, and n is approximately 0 to 1. In the chemical formula, A is an alkali metal. The alkali metal includes potassium, rubidium, cesium, and any combination thereof. In the chemical formula, M comprises an alkaline earth metal, a transition metal, a non-transition metal, and any combination thereof.SELECTED DRAWING: Figure 1

The rechargeable battery cell can include an electrode having a plurality of three-dimensional channels defined therethrough, at least 90% of the three-dimensional channels having pores between 50 nanometers and 400 microns in size. An ion exchange material can be disposed to define an interface with at least a portion of the electrode. In some embodiments, the electrode includes a zinc (Zn)-containing anode and a cathode including at least one of nickel hydroxide (Ni(OH)2), nickel oxyhydroxide (NiOOH), manganese dioxide (MnO2), copper oxide, and bismuth oxide.

The purpose of the present invention is to provide a battery module with which it is possible to pressurize a battery with a simple structure. This battery module comprises: a module housing; a battery assembly that is housed in the module housing in a vertical direction and is composed of a plurality of secondary batteries having a vertically long shape and being juxtaposed in parallel to each other; a pair of end plates that are provided on both sides of the battery assembly and face each other in the direction in which the plurality of secondary batteries are juxtaposed; and a plurality of rods that are provided perpendicular to the pair of end plates and connect the pair of end plates. Each of the rods has an extension part that extends passing through at least one end plate, and an energization means that biases at least one end plate toward the other end plate is provided in each extension part of the rod.

To provide a hydrogen storage alloy negative electrode that improves cycle life characteristics and low-temperature charge characteristics.SOLUTION: A hydrogen storage alloy negative electrode includes a hydrogen storage alloy and yttrium fluoride as an additive. The mass of yttrium fluoride is 0.1 mass part or more and 0.2 mass part or less per 100 mass parts of hydrogen storage alloy powder.SELECTED DRAWING: Figure 1

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.

The present invention belongs to the field of alkaline zinc-nickel secondary batteries and discloses a positive electrode for zinc-nickel secondary batteries, its preparation method, and application. The positive electrode is prepared from a slurry containing water, an active substance, zinc powder, a metal compound additive, a highly conductive activated carbon material, a positive electrode additive, and a binder mixed in a certain proportion, and nickel foam. The slurry is coated using a slurry pulling method. This preparation method is simple, efficient, and highly flexible, making it conducive to large-scale production. Furthermore, the highly conductive cobalt oxide and the highly conductive activated carbon material in the zinc-nickel battery positive electrode formula provided by the present invention form an excellent conductive network, effectively increasing battery capacity and improving the stability of the positive electrode.

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 utility model discloses a filling device capable of conveniently adding electrolyte in batches and used for cadmium-nickel battery production. The filling device comprises a supporting frame, the upper end of the supporting frame is fixedly connected with a tank body playing a role in storage, and the upper left end of the supporting frame is connected with round pipes in an embedded mode at equal intervals. A stirring structure and a batch liquid adding structure are arranged in the tank body and on the left side of the tank body, the stirring structure comprises a connecting shaft, a motor, a connecting rod, a stirring rod and stirring blades, and the batch liquid adding structure comprises a transition box, a liquid injection pipe, a mounting plate, an adjusting rod, an adjusting plate, a limiting plate and a connecting opening; and magnet columns are magnetically connected to the interior of the round pipe, and the magnet columns are connected to the right upper end of the movable frame in an embedded mode at equal intervals. According to the filling device capable of conveniently adding the electrolyte in batches and used for production of the cadmium-nickel battery, sufficient stirring is facilitated, the situation that the electrolyte in the tank body precipitates and consequently the concentration of the electrolyte is not uniform is prevented, the electrolyte is conveniently added in batches, efficiency is improved, and meanwhile the situation that the position of the movable frame is inclined is avoided.

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.

A cylindrical secondary battery includes a cylindrical case with open upper and lower portions, an electrode assembly including a negative electrode plate, a positive electrode plate, and a separator and accommodated in the case, a positive electrode cap sealing the open upper portion of the case, and a negative electrode cap sealing the open lower portion of the case, wherein the case includes a step portion formed along the perimeter of the open lower portion, the negative electrode cap is mounted on the step portion, and the step portion is configured such that at least a portion thereof protrudes in an inward direction to support a lower portion of the electrode assembly, the inward direction being toward a central axis of a circular cross-section of the case.

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.