A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.

A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.

A battery including a stack alternating between at least one anode and at least one cathode, a primary encapsulation system covering some of the faces of the stack, at least one anode contact member operable to make electrical contact between the stack and an external conductive element, and at least one cathode contact member operable to make an electrical contact between the stack and an external conductive element. An additional encapsulation system includes two frontal regions respectively covering a respective frontal region of the primary encapsulation system and two lateral regions which cover a respective lateral region devoid of any contact member of the primary encapsulation system. Each of the two frontal regions of the additional encapsulation system further cover the frontal ends respectively of the anode contact members and the cathode contact members. The frontal regions of the additional encapsulation system form a surface continuity with the lateral regions of the additional encapsulation system.

Thin-film batteries that include a novel encapsulation system.

The present invention relates to a method for manufacturing a secondary battery and a pre-degassing device for manufacturing a secondary battery. The method for manufacturing the secondary battery comprises: an accommodation process of accommodating an electrode assembly in an accommodation part formed inside a battery case to form a cell; an electrolyte injection process of injecting an electrolyte into the accommodation part of the battery case; a primary aging process of elapsing a predetermined time so that the electrode assembly is impregnated into the electrolyte; a primary charging process of primarily charging and discharging the cell; a pre-degassing process of pressing the battery case to discharge a gas inside the electrode assembly to the outside of the electrode assembly; and a secondary aging process of elapsing a predetermined time so that the electrode assembly is impregnated into the electrolyte, wherein, in the pre-degassing process, the battery case is pressed while applying heat to the battery case.

A solid electrolyte is composed of a compound represented by the general formula Li.sub.xM.sub.2(PO.sub.4).sub.z where M represents at least one element having a valence of one to four, x represents a number that satisfies 1.003≤x≤1.900, and z represents a number that satisfies 3.001≤z≤3.200.

Thin-film batteries having a novel encapsulation system.

Thin-film batteries having a novel encapsulation system.

The present invention provides a solid-state battery with high energy density and excellent cycle property, and a production method therefor. The production method for this solid-state battery, which contains a positive electrode, a solid electrolyte, and a negative electrode, comprises the steps of: preparing a negative electrode that is free of a negative-electrode active material; and forming, on at least one surface of the negative electrode, a solid electrolyte interface layer including a lithium-containing organic compound and a lithium-containing inorganic compound by immersing the negative electrode in a layer forming solution containing a lithium salt and a precursor and thereafter causing a reduction reaction on the surface of the negative electrode.

The present invention provides a solid-state battery with high energy density and excellent cycle property, and a production method therefor. The production method for this solid-state battery, which contains a positive electrode, a solid electrolyte, and a negative electrode, comprises the steps of: preparing a negative electrode that is free of a negative-electrode active material; and forming, on at least one surface of the negative electrode, a solid electrolyte interface layer including a lithium-containing organic compound and a lithium-containing inorganic compound by immersing the negative electrode in a layer forming solution containing a lithium salt and a precursor and thereafter causing a reduction reaction on the surface of the negative electrode.