115 results about "Nickel–zinc battery" patented technology

Nickel zinc cylindrical battery cell designs are described. The designs provided limit dendrite formation and prevent build up of hydrogen gas in the cell. The present invention also provides low-impedance cells required by rapid discharge applications. The cylindrical battery cells may have polarity opposite of that of conventional power cells, with a negative cap and positive can. The cylindrical cells may include a gel electrolyte reservoir.

Methods of manufacturing a rechargeable power cell are described. Methods include providing a slurry or paste of negative electrode materials having low toxicity and including dispersants to prevent the agglomeration of particles that may adversely affect the performance of power cells. The methods utilize semi-permeable sheets to separate the electrodes and minimize formation of dendrites; and further provide electrode specific electrolyte to achieve efficient electrochemistry and to further discourage dendritic growth in the cell. The negative electrode materials may be comprised of zinc and zinc compounds. Zinc and zinc compounds are notably less toxic than the cadmium used in NiCad batteries. The described methods may utilize some production techniques employed in existing NiCad production lines. Thus, the methods described will find particular use in an already well-defined and mature manufacturing base.

Methods of manufacturing a rechargeable power cell are described. Methods include providing a slurry, paste, or dry mixture of negative electrode materials having low toxicity and including dispersants to prevent the agglomeration of particles that may adversely affect the performance of power cells. The methods utilize semi-permeable sheets to separate the electrodes and minimize formation of dendrites; and further provide electrode specific electrolyte to achieve efficient electrochemistry and to further discourage dendritic growth in the cell. The negative electrode materials may be comprised of zinc and zinc compounds. Zinc and zinc compounds are notably less toxic than the cadmium used in nickel cadmium batteries. The described methods may utilize some production techniques employed in existing NiCad production lines. Thus, the methods described will find particular use in an already well-defined and mature manufacturing base.

Active material for a negative electrode of a rechargeable zinc alkaline electrochemical cell is made with zinc metal particles coated with tin and/or lead. The zinc particles may be coated by adding lead and tin salts to a slurry containing zinc particles, a thickening agent and water. The remaining zinc electrode constituents such as zinc oxide (ZnO), bismuth oxide (Bi₂O₃), a dispersing agent, and a binding agent such as Teflon are then added. The resulting slurry/paste has a stable viscosity and is easy to work with during manufacture of the zinc electrode. Further, the zinc electrode is much less prone to gassing when cobalt is present in the electrolyte. Cells manufactured from electrodes produced in accordance with this invention exhibit much less hydrogen gassing, by as much as 60-80%, than conventional cells. The cycle life and shelf life of the cells is also enhanced, as the zinc conductive matrix remains intact and shelf discharge is reduced.

A nickel-zinc battery cell is formed with a negative can, a positive cap, and a jelly roll of electrochemically active positive and negative materials within. The inner surface of the can is protected with an anticorrosive material that may be coated or plated onto the can. Good electrical contact between the jelly roll and the cap is achieved through folding the nickel substrate over to contact a positive current collection disk.

A nickel-zinc battery includes a battery housing, a nickel oxide positive electrode supported in the battery housing, a metal substrate negative electrode supported in the battery housing, a spacer disposed between the positive and negative electrodes, an electrolyte contained within the battery housing and a means for circulating electrolyte in fluid communication with the housing for circulating the electrolyte between the positive and negative electrodes. The electrolyte contains zinc and the metal substrate is adapted for deposition of the zinc during charging of the battery. The spacer maintains the positive electrode in a spaced relationship apart from the negative electrode.

Methods of manufacturing a rechargeable power cell are described. Methods include providing a slurry, paste, or dry mixture of negative electrode materials having low toxicity and including dispersants to prevent the agglomeration of particles that may adversely affect the performance of power cells. The methods utilize semi-permeable sheets to separate the electrodes and minimize formation of dendrites; and further provide electrode specific electrolyte to achieve efficient electrochemistry and to further discourage dendritic growth in the cell. The negative electrode materials may be comprised of zinc and zinc compounds. Zinc and zinc compounds are notably less toxic than the cadmium used in nickel cadmium batteries. The described methods may utilize some production techniques employed in existing NiCad production lines. Thus, the methods described will find particular use in an already well-defined and mature manufacturing base.

A cylindrical Ni—Zn battery includes a battery shell, an electrode assembly and a liquid electrolyte which are sealed within the shell. The electrode assembly, whose upper part is connected to a cap, includes a nickel cathode, zinc anode, and a composite membrane. The nickel cathode and zinc anode have an edge portion which are externally exposed and bent inwardly to form the anode and cathode conductive end respectively, and edges of the composite membranes are sealed together, so that the electrodes are contained in the membranes. The battery is characterized by the simple in structure, convenient installation, low cost, safety, characteristics of long-term storage, effectively preventing the growth of dendrite, long life, strong capability to resist shake, and good performance of large current discharging.

Thin-film electrodes and battery cells, and methods of fabrication. A thin film electrode may be fabricated from a non-metallic, non-conductive porous support structure having pores with micrometer-range diameters. The support may include a polymer film. A first surface of the support is metalized, and the pores are partially metallized to create metal tubes having a thickness within a range of 50 to 150 nanometers, in contact with the metal layer. An active material is disposed within metalized portions of the pores. An electrolyte is disposed within non-metalized portions of the pores. Active materials may be selected to create an anode and a cathode. Non-metalized surfaces of the anode and cathode may be contacted to one another to form a battery cell, with the non-metalized electrolyte-containing portions of the anode facing the electrolyte-containing portions of the cathode pores. A battery cell may be fabricated as, for example, a nickel-zinc battery cell.

Rechargeable and replaceable zinc cartridges have been used as the components of nickel-zinc batteries. The battery life of a zinc battery is extended by periodic replacing of the zinc anodes at about 10% of the battery cost. Flat modules that include several cells interconnected with channels are used as basic elements of a flat battery. A home wall battery is produced by assembling the modules using rotational joints. The performance of the zinc current collectors is improved by deposition of Zn—Cu—Bi alloy. Zinc composition is formulated using additives of polyphenylenediamines and zirconium hollow fibers.

A method for preparing a composite alkaline solid polymer electrolyte from polyvinyl alcohol (PVA) polymer, potassium hydroxide and water is disclosed. Said polymer electrolyte is reinforced with glass-fiber cloth to increase its mechanical strength, thermal stability and electrochemical stability. The glass fiber cloth matrix provides a stable interface between the cathode and the anode to reduce the short circuit problem when the battery discharges at high rate. The processes for polymer electrolyte are controlled by molecular weight of PVA polymer, the sequence of feeding in reactants, the weight proportions of reactants, the reaction time, the reaction temperature, and the drying conditions, i.e. under the specified conditions of relative humidity (RH), temperature and drying time. The resulting electrolyte exhibits ionic conductivity of 0.15 S/cm or better at room temperature and has high mechanical intensity and good electrochemical stability. This polymer electrolyte can replace the conventional PP non-woven fabric separator in primary and secondary alkaline batteries, metal-air battery, nickel-metal hydride battery, nickel-cadmium battery, nickel-zinc battery, fuel cells and capacitors. This composite PVA-GF polymer electrolyte can be used in thin-film alkaline battery system (thickness <4 mm) to reduce the weight and thickness of battery, while significantly increasing the energy and power densities of the battery. It offers another opportunity for making thin and lightweight batteries to be used in future 3C electronic products.

The invention provides a three-dimensional zinc/carbon composite material for a zinc-based battery. The three-dimensional zinc/carbon composite material comprises a carbon conducting network of a three-dimensional multistage structure and zinc and/or zinc oxide loaded on the carbon conducting network, wherein the mass ratio of the zinc and/or the zinc oxide is 50-95%; the three-dimensional carbonconducting network is obtained through carbonization treatment of a polymer and has a macroporous, mesoporous and microporous pore structure; the shapes and forms of the zinc and the zinc oxide loadedon the three-dimensional carbon conducting network are one or more of a globular shape, a rod shape and a needle shape independently; and the sizes of the zinc and the zinc oxide are 10nm to 20 microns. The invention further provides a preparation method of the composite material. The three-dimensional zinc/carbon composite material provided by the invention has an ordered porous structure and high conductivity, has excellent electrochemical properties and cycle stability when used as a negative electrode of a nickel-zinc battery, and can be widely applied to the fields of various portable electronic devices, electric vehicles and aerospace.

The application discloses a power system for an electrombile, wherein a motor and a motor control system are arranged on the electrombile, the power system for the electrombile comprises an installing support, a nickel-zinc battery pack, an overcharge protector and an overdischarge protector, the nickel-zinc battery pack is fixed in the installing support on the electrombile, a charge protecting loop and a discharge protecting loop are arranged on the nickel-zinc battery pack, the discharge protecting loop is connected with the motor and the motor control system, and the overcharge protector is connected in the discharge protecting loop in series, and is used for detecting the temperature of the nickel-zinc battery pack and controlling the charge protecting loop to be switched on or off according to the detected temperature; and the overdischarge protector is connected in the discharge protecting loop in series, and is used for acquiring the voltage of a nickel-zinc battery single body, and controlling the discharge protecting loop to be switched on or off according to the acquired voltage. According to the power system for the electrombile, the conditions of overcharge and overdischarge can be avoided, the service life of the battery can be prolonged, and the performance of the electrombile can be further improved.

The invention discloses a base material of the cathode of a nickel zinc battery. The base material of the cathode of a nickel zinc battery adopts a brass inclined pull net; and the brass inclined pull net comprises 65-75% of copper, 25-25% of zinc and 0.5-1.5% of tin. With the three-dimensional structure, the brass inclined pull net can lead the contact area between the cathode material and the base material to be increased, increases the filling quantity of the active material, and has good current-collecting and electricity-conducting function. The battery has the advantages of stable performance, long cycle life, low cost, simple preparation technology of base material, good electrical conductivity, etc.

The invention discloses a preparation method of a cathode material for a nickel-zinc battery. The method comprises large-scale modification of a carbon material, so that the surface has an oxygen-containing group, and the carbon material has good dispersity in water or an organic solvent. The invention further discloses a preparation method of an Ni(OH)<2>/carbon composite material. The material is applied to a positive electrode and a Zn negative electrode to construct a soft package NiZn battery. A test result shows that the material improves the electric contact performance of the electrodes when used as an electrode material, so that the overall electrochemical properties of the electrodes and the battery including the material are improved.

Provided is a highly reliable nickel-zinc battery including a separator exhibiting hydroxide ion conductivity and water impermeability. The nickel-zinc battery includes a positive electrode containing nickel oxide and/or nickel oxyhydroxide; a positive-electrode electrolytic solution in which the positive electrode is immersed, the electrolytic solution containing an alkali metal hydroxide; a negative electrode containing zinc and/or zinc oxide; a negative-electrode electrolytic solution in which the negative electrode is immersed, the electrolytic solution containing an alkali metal hydroxide; a hermetic container accommodating the positive electrode, the positive-electrode electrolytic solution, the negative electrode, and the negative-electrode electrolytic solution; the separator exhibiting hydroxide ion conductivity and water impermeability and disposed in the hermetic container to separate a positive-electrode chamber accommodating the positive electrode and the electrolytic solution from a negative-electrode chamber accommodating the negative electrode and the electrolytic solution; and a porous substrate on a surface of the separator facing toward the positive electrode.