348results 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.

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.

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.

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 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.

The invention deals with a sensor for sensing electrolyte creepage in a battery, a circuit comprising such sensor, and a battery connected to such circuit, with an application to an electrical circuit comprising the sensor and connecting a monitoring equipment to a to battery.The sensor element is adapted for being connected within an electrical circuit 1 connected to a battery 2, said battery comprising one or more electrochemical cells containing an electrolyte, wherein the sensor element comprises a electrical conductor element whose at least one electrical property varies when in contact with the electrolyte, such as to allow, when the sensor element is connected in a circuit, detection of an electrolyte creepage from a an electrochemical element of a battery 2 connected to the circuit 1 by measurement of the variation of the one electrical property of the conductor element.

The invention relates to the technical field of battery manufacturing, in particular to a nickel-metal hydride battery electrolyte preparation device which comprises a stirring tank, a batching mechanism is arranged on the surface of the stirring tank and comprises a material storage tank, the material storage tank is fixedly connected to the top of the stirring tank, and a first servo motor is fixedly connected to the surface of the material storage tank; and an output shaft of the first servo motor is fixedly connected with a rotating rod. The first servo motor drives the spiral blade to rotate, the weight of materials is monitored in real time in combination with the gravity sensor, quantitative feeding of the materials is achieved, the whole-course closed conveying of the materials from the storage tank to the stirring tank is achieved in cooperation with the rotary dumping function of the high-precision measuring cylinder, the materials are accurately weighed through the high-precision measuring cylinder, and the material conveying efficiency is improved. And the materials can be accurately blended, the defect that fluctuation is likely to occur in manual blending is overcome, and the preparation quality of the electrolyte is greatly improved.

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 preparation method of a binder-free electrode suitable for a low-temperature battery, the electrode is a NiO C / Ni composite film, and the preparation process comprises the following steps: dissolving a nickel salt, an amide compound and villiaumite in deionized water, uniformly mixing, and then placing in a reaction kettle; placing foamed nickel in the mixed solution, performing hydrothermal reaction in a constant-temperature box, then taking out the foamed nickel, and cleaning to obtain a precursor; putting the precursor into a Tris solution containing dopamine, and soaking at a constant temperature to obtain an intermediate product; and placing the intermediate product in an inert atmosphere tube furnace, and calcining to obtain the NiO-coated C / Ni composite film. The composite film can be directly used as a battery electrode, use of a binder is avoided, the problem of electrode failure caused by binder embrittlement at low temperature can be effectively solved, and the composite film has excellent performance in low-temperature nickel-iron battery application; in addition, the preparation process is simple, a complex blade coating film preparation process is avoided, and large-scale application and popularization are easy.

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.