956results about "Secondary cell gas removal" patented technology

A non-aqueous battery is provided in a pouchy casing comprising opposing sheets of at least three-layer laminates, each laminate comprising (1) an inner thermoplastic resin layer, (2) a middle metal foil layer, and (3) an outer electrically insulating material layer, wherein the pouchy casing has an elongated, hermetic adhesion area along a periphery of the pouchy casing, and the middle metal foil layer has a peripheral elongated region in the elongated, hermetic adhesion area of the pouchy casing, and at least a pair of terminals electrically connected to the cathode and anode of the battery extends through and protrudes from the terminal-withdrawal sites in the elongated, hermetic adhesion area toward the outside of the pouchy casing, and the battery has at least one of the following features: (i) the peripheral elongated region of the middle metal foil layer has cut-out portions around the terminal-withdrawal sites and (ii) the surface of the peripheral edge of the pouchy casing is provided with electric insulation at least at portions around the terminal-withdrawal sites.

A lead-acid battery comprising: at least one lead-based negative electrode; at least one lead dioxide-based positive electrode; at least one capacitor electrode; and electrolyte in contact with the electrodes; wherein a battery part is formed by the lead based negative electrode and the lead dioxide-based positive electrode; and an asymmetric capacitor part is formed by the capacitor electrode and one electrode selected from the lead based negative electrode and the lead-dioxide based positive electrode; and wherein all negative electrodes are connected to a negative busbar, and all positive electrodes are connected to a positive busbar. The capacitor electrode may be a capacitor negative electrode comprising carbon and an additive mixture selected from oxides, hydroxides or sulfates of lead, zinc, cadmium, silver and bismuth, or a capacitor negative electrode comprising carbon, red lead, antimony in oxide, hydroxide or sulfate form, and optionally other additives. The capacitor electrode may be used in asymmetric capacitors and batteries of other types.

A cylindrical lithium-ion battery with excellent safety where abnormal heat generation and remarkable deformation of a battery container do not occur even at an abnormal time is provided. When an average diameter of a winding group 6 is A mm, an inner diameter of the battery container 5 is B mm, a longitudinal length of the winding group 6 except for lead pieces extending from the winding group 6 is H mm, and the number of windings where a layer of one unit comprising a negative electrode member/separator/negative electrode member/separator is wound around a shaft core 11 is W, a calculation value K obtained by a formula; K=(B-A)x(10000/(WxH) is set to 0.89 or more. When the calculation value K is 0.89 or more, a gap (B-A) between an outer periphery of the winding group 6 and an inner periphery of the battery container 5 that enables the winding group 6 to expand in its diameter direction at an abnormal time is properly secured.

The present invention relates to a bipolar battery, especially a NiMH battery, having: a sealed housing, a negative end terminal, a positive end terminal, and at least one biplate assembly comprising a biplate, a positive and a negative electrode. A separator is arranged between each negative and positive electrode forming a battery cell, said separator includes an electrolyte. An inner barrier of a hydrophobic material is arranged around at least one electrode, whereby said inner barrier prevents an electrolyte path from one cell to another cell, and a frame is present to provide predetermined cell spacing between each biplate and/or biplate and end terminal. The frame is attached in such a way to each biplate to permit ambient gas to pass between adjacent cells, thereby creating a common gas space for all cells in the battery. The invention also relates to a method for manufacturing a bipolar battery.

A composite electrolyte including a polymeric ionic liquid; a plurality of inorganic particles; and an organic electrolyte.

A secondary battery module including a plurality of secondary battery cells, each secondary battery cell including electrodes on one side thereof and a vent on the same side as the electrodes, a module frame coupled to the plurality of secondary battery cells and fixing the secondary battery cells in a predetermined arrangement, the module frame including a plurality of vent holes corresponding to the vents of the secondary battery cells, and protrusions disposed around the vent holes and protruding toward the vents, wherein each vent of the secondary battery cells is coupled to one of the protrusions of the module frame.

The present invention is directed to nanowire structures and interconnected nanowire networks comprising such structures, as well as methods for their production. The nanowire structures comprise a nanowire core, a carbon-based layer, and in additional embodiments, carbon-based structures such as nanographitic plates consisting of graphenes formed on the nanowire cores, interconnecting the nanowire structures in the networks. The networks are porous structures that can be formed into membranes or particles. The nanowire structures and the networks formed using them are useful in catalyst and electrode applications, including fuel cells, as well as field emission devices, support substrates and chromatographic applications.

A thin battery includes a flat battery body having a positive electrode and a negative electrode having an electrolyte layer disposed between the electrodes. A flexible encapsulating bag seals the battery body with a sealing portion. A positive electrode collector tab and a negative electrode collector tab are respectively connected to the positive and negative electrodes. The tabs penetrate the encapsulating bag. At least one of the tabs includes first and second collector tabs and a safety device so that an electrical connection between the first and second collector tabs may be interrupted when the internal pressure of the encapsulating bag exceeds a predetermined value.

The present invention relates to a bipolar battery provided with a pressure sensor. The battery is provided with a housing 7 containing common gas space 97. The pressure sensor 10; 20; 50; 63; 80; 111 comprises: an actuator 3, 21; 31; 41; 48; 81 configured to transfer an internal pressure P within the common gas space to a reciprocal movement, and a switching device 5; 83 configured to generate a control signal indicative of changes in relation to an initial switching state generated by said reciprocal movement when the internal pressure exceeds a predetermined upper level. The pressure sensor further comprises a reset means 4; 32; 81 to automatically reset the switching device to the initial switch state when the internal pressure goes below a predetermined lower level, whereby said control signal is based on the internal pressure (P) within said sealed common gas space. The present invention also relates to a method for charging bipolar batteries.

An electroactive material for use in an electrochemical cell, like a lithium-ion battery, is provided. The electroactive material comprises lithium titanate oxide (LTO) and has a surface coating with a thickness of less than or equal to about 30 nm that suppresses formation of gases within the electrochemical cell. Methods for making such materials and using such materials to suppress gas formation in electrochemical cells are likewise provided.

The present invention relates to an anode active material for a lithium secondary battery, which comprises a core layer comprising a carbon-silicon composite, and a shell layer comprising a conductive material and a carbonaceous material for fixing the conductive material, uniformly coated on a surface of the core layer; and the preparation method thereof.

A multi-cell battery in which a plurality of electrochemical cells are disposed in a battery case. The battery case includes one or more partitions which divide the interior of the case into a plurality of cell compartments that house the electrochemical cells. The battery case includes at least one gas channel have a tortuous pathway designed to trap electrolyte which may escape from the cell compartments. A unique battery terminal may be molded into the battery case.

A main object of the present invention is to provide an air battery system which can restrain the internal resistance caused by the shortage of liquid electrolyte from increasing and which can carry out a high-rate discharge. The present invention resolves the above-mentioned object by providing an air battery system comprising: an air battery cell which contains an air cathode, an anode, and a separator; and an oxygen gas supply means for supplying an oxygen gas by bubbling to a liquid electrolyte, characterized in that the air cathode further contains an air cathode layer containing a conductive material, and an air cathode current collector for collecting current of the air cathode layer; the anode further contains an anode layer containing an anode active material which stores and releases a metal ion, and an anode current collector for collecting current of the anode layer; and the separator is provided between the air cathode layer and the anode layer, and characterized in that the air cathode layer and the anode layer are constantly filled with the liquid electrolyte at a time of a change in a volume of the electrode caused by a discharge or a discharge and charge.

A liquid-cooled battery, in particular in the form of an energy store for an electrical drive in a motor vehicle is provided. The battery has a plurality of storage cells 2 and at least one volume 4 which makes thermally conductive contact with the storage cells 2 and through which a cooling medium can flow. Each of the storage cells 2 has a safety valve 12 which opens the storage cell when a predetermined media pressure in it is exceeded, and connects the volume of the storage cell to the surrounding area. The safety valve 12 is arranged in the storage cell 2 and the storage cell 2 is arranged with respect to the volume 4 through which the cooling medium can flow such that a connection is produced between the volume 4 through which the cooling medium can flow, and the interior of the storage cell 2 if the safety valve 2 is operated.

A rechargeable electrochemical cell is provided having a pressure-responsive apparatus for determining a charge termination point. In particular, a reversible pressure-responsive switch may be disposed in a cap at the open end of a rechargeable metal hydride cell. The reversible pressure-responsive switch may also contain a vent system for releasing the cell internal pressure. Alternatively, a rechargeable cell may include a strain gauge disposed in its outer surface whose resistance changes as the outer surface of the battery expands due to internal pressure accumulation during charging. Additionally, a rechargeable cell is used combination with a charging source that can supply constant voltage, constant current, alternating current, or voltage that varies between a minimum threshold and a maximum threshold.

Lithium cobaltate forming the positive electrode of a lithium secondary battery is subjected together with lithium metal to reducing reaction in molten lithium chloride to produce lithium oxide and to precipitate and separate cobalt or cobalt oxide. The lithium oxide is subjected to electro-deposition in molten lithium chloride contained in a lithium electro-deposition tank provided with an anode and a cathode to recover lithium metal deposited on the cathode.

The invention relates to cathode materials for Li-ion batteries in the quaternary phase diagram Li[Li_1/3Mn_2/3]O₂—LiMn_1/2Ni_1/2O₂—LiNiO₂—LiCoO₂, and having a high nickel content. Also a method to manufacture these materials is disclosed. The cathode material has a general formula Li_a((Ni_z(Ni_1/2Mn_1/2)_yCo_x)_1-kA_k)_2-aO₂, wherein x+y+z=1, 0.1≦x≦0.4, 0.36≦z≦0.50, A is a dopant, 0≦k≦0.1, and 0.95≦a≦1.05, and having a soluble base content (SBC) within 10% of the equilibrium soluble base content.

An electrical accumulator having a case in the form of a button cell which is closed such that it is gastight, including a case cover and a case cup with an interposed electrically insulating seal, which contain an electrode set including positive and negative electrodes as well as interposed separators, with at least two electrodes of one polarity being mechanically. and electrically connected at at least two points on their circumference in such a manner that a mechanically robust electrode packet results. The invention furthermore relates to a method for producing such a rechargeable battery.