A method for reinjecting an electrolyte, and a secondary battery capable of being reinjected with an electrolyte are described. The method for reinjecting an electrolyte is a method for reinjecting an electrolyte into a secondary battery in which an electrode assembly and an electrolyte are accommodated in a pouch. The pouch includes an aluminum sheet, in which a functional hole is formed, and a polymer layer stacked on the aluminum sheet. The method includes a reinjection process of injecting an additional electrolyte into the pouch through the functional hole by opening the functional hole, and a sealing process of sealing the functional hole after the reinjection process.

An apparatus for enhancing electrolyte wetting in a rechargeable battery, which can improve an electrolyte wetting dispersion and enhancing electrolyte wetting in the rechargeable battery by vacuating gases trapped in an electrode assembly by injecting an electrolyte into the electrode assembly and pushing the rechargeable battery, and an electrolyte wetting enhancing method utilizing the same. The electrolyte wetting enhancing apparatus includes a chamber having an internal space; a battery fixing unit fixed in the internal space of the chamber and including a plurality of rechargeable batteries mounted therein; and a pushing member pushing opposite side surfaces of the plurality of rechargeable batteries. The pushing member pushes the plurality of rechargeable batteries to enhance electrolyte wetting into an electrode assembly including the plurality of rechargeable batteries into which the electrolyte is injected.

A technology capable of sealing a target with higher airtightness is provided. The plug attaching device disclosed herein is for attaching, to a through hole of a target, a cylindrical plug having therein a non-through hole that has an opening in one end surface. The device includes an insertion pin, and a guide portion. The guide portion is slidable in the axial direction of the insertion pin. This device is configured such that the plug is disposed inside the through hole, the insertion pin is pushed into the non-through hole with the guide portion disposed on the periphery of the opening to attach the plug into the through hole, and after the attachment, the insertion pin is moved in an opposite direction to the non-through hole to remove the insertion pin from the non-through hole, and the guide portion is then detached from the opening.

A technology capable of sealing a target with higher airtightness is provided. The plug attaching device disclosed herein is for attaching, to a through hole of a target, a cylindrical plug having therein a non-through hole that has an opening in one end surface. The device includes an insertion pin, and a guide portion. The guide portion is slidable in the axial direction of the insertion pin. This device is configured such that the plug is disposed inside the through hole, the insertion pin is pushed into the non-through hole with the guide portion disposed on the periphery of the opening to attach the plug into the through hole, and after the attachment, the insertion pin is moved in an opposite direction to the non-through hole to remove the insertion pin from the non-through hole, and the guide portion is then detached from the opening.

An apparatus for enhancing electrolyte wetting in a rechargeable battery, which can improve an electrolyte wetting dispersion and enhancing electrolyte wetting in the rechargeable battery by vacuating gases trapped in an electrode assembly by injecting an electrolyte into the electrode assembly and pushing the rechargeable battery, and an electrolyte wetting enhancing method utilizing the same. The electrolyte wetting enhancing apparatus includes a chamber having an internal space; a battery fixing unit fixed in the internal space of the chamber and including a plurality of rechargeable batteries mounted therein; and a pushing member pushing opposite side surfaces of the plurality of rechargeable batteries. The pushing member pushes the plurality of rechargeable batteries to enhance electrolyte wetting into an electrode assembly including the plurality of rechargeable batteries into which the electrolyte is injected.

Provided is a method for manufacturing a secondary cell by which a wound body can be effectively impregnated with an electrolytic solution. The method includes: a step of depressurizing an interior of an outer case 30; a step of pouring an electrolytic solution E into the depressurized outer case 30; a step of depressurizing the interior of the outer case 30; a step of pouring the electrolytic solution E into the depressurized outer case 30; a step of impregnating the wound body with the electrolytic solution E from both axial end portions 100a, 100b of a wound body 100; a step of waiting until a difference in pressure between a wound body external space S, which is a space between the outer case 30 and the wound body, and a wound body internal space S1 is reduced after the impregnation with the electrolytic solution E; and a step of pressurizing the wound body external space S.

A main object of the present disclosure is to provide a method for producing a battery in which the degrade of sealability in a liquid injection frame is inhibited. The present disclosure achieves the object by providing the method including: a preparing step of preparing an electrode member that includes an electrode layered body including a plurality of electrode layered in a z axis direction, and a liquid injection frame made of a resin arranged in a side surface of the electrode layered body; a liquid injection step of injecting a liquid electrolyte into the electrode layered body in the electrode member via the liquid injection frame; a temporary sealing step of temporary sealing the liquid injection frame by arranging a gas pack to cover an entire outer periphery of the liquid injection frame when viewed from an x axis direction orthogonal to the z axis direction; a gas storing step of storing a gas generated due to charging or aging in a space inside the gas pack; a degassing step of degassing the gas by opening the gas pack after the gas storing step; and a sealing step of sealing the liquid injection frame with a sealing member.

Provided is a method of manufacturing a sealed battery, capable of releasing a gas generated during an initial charge without increasing the number of steps. The method of manufacturing the sealed battery including a battery case having an opening, and a power-generating element stored in the battery case, includes: a step of storing an electrode body in the battery case; a step of pouring an electrolyte solution into the battery case through the opening to turn the electrode body into the power-generating element; a step of temporarily sealing the opening with a temporary sealing member; a step of performing the initial charge of the power-generating element; a step of introducing a detection gas into the battery case through the opening while opening the temporarily sealed opening; and a step of finally sealing the opening with a final sealing member.

Methods and devices are provided for filling and sealing an energy storage device. The process includes, for instance: providing an energy storage device with an opening to an electrolyte-receiving chamber; filling the electrolyte-receiving chamber with an electrolyte; cooling the electrolyte within the electrolyte-receiving chamber; and sealing the opening while cooling the electrolyte within the electrolyte-receiving chamber.

The present disclosure provides a method for manufacturing an electricity storage device that includes a lid including a pouring hole and closing an opening of a case body. The method includes: a temporary sealing step involving affixing an adhesive tape to the lid such that the pouring hole is closed; and an unsealing step involving peeling off the adhesive tape affixed to the lid. The temporary sealing step involves bringing the adhesive tape into intimate contact with a peripheral edge of the pouring hole of the lid, and causing a portion of the adhesive tape located at a distance from the pouring hole to be at least partially lifted from the lid.