The present disclosure relates to a cover plate assembly for a lithium ion battery and a lithium ion battery. The cover plate assembly includes a cover plate body, provided at a middle portion thereof with a through hole which extends to form a tube body, and the tube body protrudes from at least one surface of the cover plate body; a pressure relief portion, wherein the pressure relief portion is located in the tube body and is in sealed communication with the tube body, the pressure relief portion is ring-shaped and is configured to crack and split from the cover plate body in response to deformation of the cover plate body; and a central conductor, embraced by the pressure relief portion and runs through the pressure relief portion along the axial direction. The cover plate assembly features excellent safety performance and small space occupation.

The present disclosure relates to a cover plate assembly for a lithium ion battery and a lithium ion battery. The cover plate assembly includes a cover plate body, provided at a middle portion thereof with a through hole which extends to form a tube body, and the tube body protrudes from at least one surface of the cover plate body; a pressure relief portion, wherein the pressure relief portion is located in the tube body and is in sealed communication with the tube body, the pressure relief portion is ring-shaped and is configured to crack and split from the cover plate body in response to deformation of the cover plate body; and a central conductor, embraced by the pressure relief portion and runs through the pressure relief portion along the axial direction. The cover plate assembly features excellent safety performance and small space occupation.

A miniature electrochemical cell having a total volume that is less than 0.5 cc is described. The cell casing is formed by joining two ceramic casing halves together. One or both casing halves are machined from ceramic to provide a recess that is sized and shaped to contain the electrode assembly. The opposite polarity terminals are metal feedthroughs, such as of gold, and are formed by brazing gold into openings machined into one or both ceramic casing halves. The two ceramic casing halves are separated from each other by a metal interlayer, such as of gold, bonded to a thin film metallization adhesion layer, such as of titanium, that contacts an edge periphery of each ceramic casing half. A solid electrolyte (Li.sub.xPO.sub.yN.sub.z) is used to activate the electrode assembly.

The present invention provides a large-capacity secondary battery, including: a rechargeable cell, a steel shell, a protection IC, an integrated IC, resistors, capacitors, an inductor, an LED lamp, a plastic part, a circular rigid FR-4 substrate, a metal cap, an insulation pad and an insulation heat shrink film, for integrating multiple functions of a constant voltage output, charge management and protection, and overcharge, overdischarge and overcurrent protection. Compared with the prior art, the large-capacity secondary battery of the present invention can achieve multi-functional integration of the battery, and also can save the space occupied by accessory structural parts of the battery and achieve a large capacity of the battery.

A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell casing has a header assembly comprising a ceramic plate, preferably of alumina, that is formed by co-firing a metallic-containing paste residing in first and second via holes extending through a green state ceramic. The ceramic plate is joined to an annular metal ring by a gold-braze to form the header assembly that is secured to an open-ended metal container by a weld to thereby provide the cell casing. The metal-containing fill material resulting from sintering the metallic-containing paste provides a first conductive pathway in an electrically conductive relationship with the anode current collector contacting an anode active material and a second conductive pathway in an electrically conductive relationship with a cathode current collector contacting a cathode current collector. A solid electrolyte, preferably of LiPON (Li.sub.xPO.sub.yN.sub.z), activates the anode and cathode while also serving as a separator keeping the opposite polarity electrodes from contacting each other. Outer surfaces of the first and second conductive pathways are configured for electrical connection to a load.

A composite including a polymer matrix; an inorganic moisture absorber; a ceramic filler, graphite, or a combination thereof; and a tracking resistance polymer, wherein the tracking resistance polymer includes an average bond energy between an atom forming a main chain and another atom covalently bonded to the atom that forms the main chain of about 350 kJ/mol to about 500 kJ/mol; a carbonaceous residue yield after pyrolysis of less than or equal to about 5 weight percent, based on the amount of the tracking resistance polymer before pyrolysis; or a combination thereof.

A secondary battery includes an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode, a cap assembly electrically connected to the first electrode, a case accommodating the electrode assembly therein, the case having an opening in which the cap assembly is inserted, a first insulator between the cap assembly and the case, and a second insulator between the first insulator and the cap assembly. In the secondary battery, the second insulator has a higher melting point than the first insulator, thereby improving durability.

A nickel-metal hydride secondary battery is provided with: an outer package can having an opening at an upper end; an electrode group accommodated in the outer package can together with an alkaline electrolyte; and a sealing body that seals the opening of the outer package can. The sealing body includes a cover plate having a central through hole, and a valve element made of an elastic material to close the central through hole. The valve element includes a cylindrical main body part having a base end surface that covers the central through hole, and an extended diameter part positioned on an opposite side of the main body part from the base end surface and having a diameter made larger than a diameter of the main body part. A ratio R of a thickness T of the extended diameter part to a total height H of the valve element is equal to or higher than 27%.

A battery case including a container having an opening and a sink configured to accommodate an electrode, and a cover having a contact portion configured to contact with the container. The battery case includes a polymer base material, the container includes a bottom wall and side walls, that are integrated to form the sink and the opening opposed to the bottom wall. A nanometer-size concavo-convex edge feature is positioned on at least one portion of the end face of the side walls configured to form the opening and on at least one portion of the contact surface of the contact portion of the cover configured to contact with at least one portion of the end face of the sidewalls of the container. A battery or a battery module including the battery case and an electrode assembly accommodated in the sink of the container of the battery case.

A miniature electrochemical cell having a total volume that is less than 0.5 cc is described. The cell casing is formed by joining two ceramic casing halves together. One or both casing halves are machined from ceramic to provide a recess that is sized and shaped to contain the electrode assembly. The opposite polarity terminals are metal feedthroughs, such as of gold, and are formed by brazing gold into openings machined into one or both of ceramic casing halves. A thin film metallization, such as of titanium, contacts an edge periphery of each ceramic casing half. The first ceramic casing half is moved into registry with the second ceramic casing half so that the first and second ring-shaped metallizations contact each other. Then, a laser welds through one of the casing halves being a substantially transparent ceramic, for example sapphire, to braze the first and second ring-shaped metallizations to each other to thereby join the first and second casing halves together to form a casing housing the electrode assembly. A solid electrolyte (Li.sub.xPO.sub.yN.sub.z) activates the electrode assembly.