Manufacturing machine to manufacture a cylindrical battery having a cylindrical case which is closed at the top by a lid There are provided: a first processing drum, mounted to rotate around a first rotation axis, a first seat to support the cylindrical case; a deformation unit, to create an annular groove on a side wall of the cylindrical case; a second processing drum, is arranged downstream of the first processing drum and mounted so as to rotate around a second rotation axis, a second seat designed to support the cylindrical case; a feeding unit, to feed the lid on top of the cylindrical case supported by the second seat; a third processing drum, arranged downstream of the second processing drum (31), a third seat (48) to support the cylindrical case; and a bending unit, configured to bend a rim of the cylindrical case against the lid.

A battery case lid is formed by working a metal plate, and includes a substrate section and an explosion-proof valve formed in the substrate section. The explosion-proof valve has a reduced thickness section that is thinner than the substrate section, and the reduced thickness section is formed by extending the metal plate by applying pressure while the metal plate is kept unrestrained.

Apparatus for transporting used, damaged or defective electrochemical cells while preventing and controlling safety-critical states of the electrochemical cells, such as lithium ion-based cells and/or lithium ion polymer cells, having an outer surrounding wall, a base and a cover which can be closed, which surrounding wall, base and cover define a chamber between them. An intermediate chamber is filled with a fire-retardant material which is composed of only inert, non-conductive and non-combustible and absorbent hollow glass granules as bulk material, and a basket which is permeable to the fire-retardant material is arranged in the chamber for receiving an electrochemical cell.

The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a reaction solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 10 to 100 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method and a supercritical hydrothermal synthesis method, a reaction may be performed under a relatively lower pressure. When compared to a common glycothermal synthesis method, a lithium iron phosphate nanopowder having effectively controlled particle size and particle size distribution may be easily prepared.

A battery having flat, stacked, anode and cathode layers. The battery can be adapted to fit within an implantable medical device.

The present invention relates to a method for preparing a lithium iron phosphate nanopowder coated with carbon, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a reaction solvent, (b) putting the mixture solution into a reactor and reacting to prepare amorphous lithium iron phosphate nanoseed particle, and (c) heat treating the lithium iron phosphate nanoseed particle thus to prepare the lithium iron phosphate nanopowder coated with carbon on a portion or a whole of a surface of a particle, and a lithium iron phosphate nanopowder coated with carbon prepared by the above method. A lithium secondary battery including the lithium iron phosphate nanopowder coated with carbon thus prepared as a cathode active material has good capacity and stability.

Non-flammable electrolyte compositions for lithium metal primary batteries and the cells containing these electrolytes are described. The electrolyte compositions comprise one or more partially or fully fluorinated functionalized short chain polyethers with one or more lithium salts, and may include one or more cosolvents, and may have one or more fire retardants added. Said short chain functionalized fluorinated polyethers have much better ionic conductivity than the alkyl terminated fluorinated polyethers or long chain perfluoropolyethers, which provide superior flame resistance without sacrificing overall battery performance. Heat resistant, non-flammable primary lithium cells are also disclosed.

The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a reaction solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 1 to 10 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method, a supercritical hydrothermal synthesis method and a glycothermal synthesis method, a reaction may be performed under a relatively lower pressure. Thus, a high temperature/high pressure reactor is not necessary and process safety and economic feasibility may be secured. In addition, a lithium iron phosphate nanopowder having uniform particle size and effectively controlled particle size distribution may be easily prepared.

A method of manufacturing a sealed battery includes a welding step of forming a welded portion, and the welding step includes a first step of sequentially forming a plurality of weld beads in an opening edge portion and an outer peripheral edge portion such that the plurality of weld beads are spaced apart from one another, and a second step of forming a weld bead in each gap portion located between the weld beads, with a plurality of gap portions being formed in the opening edge portion and the outer peripheral edge portion.

A stacking apparatus includes a first rotating table that is equipped with a plurality of stacking regions and intermittently rotates the plurality of stacking regions respectively to a plurality of work positions, a first turning unit; and a second turning unit. The first turning unit includes a first arm that turns between the first stacking position and a first pickup position where an anode sheet is picked up and a second arm that turns in concert with movement of the first arm between the first stacking position and a second pickup position where a separator is picked up. The second turning unit includes a third arm that picks up a cathode sheet and a fourth arm that turns in concert with movement of the third arm and picks up a separator.