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 collapsible storage unit including: a plurality of triangular sidewalls at least partially defining a cavity for storing a liquid electrolyte therein; wherein the plurality of triangular sidewalls are configured to collapse in a longitudinal direction about a hinge disposed between adjacent sides of each of the plurality of triangular sidewalls.

The present disclosure provides a battery. The battery includes a separation structure having a resistance greater than a resistance threshold; a positive electrode of the battery and a negative electrode of the battery disposed on two sides of the separation structure; a liquid conductor configured to transport conductive ions between the positive electrode and the negative electrode; a storage structure configured to store supplementary material to release into the liquid conductor; and an enclosure configured to form an enclosed cavity to accommodate the separation structure, the positive electrode, the negative electrode, the liquid conductor, and the storage structure.

The present disclosure provides a battery. The battery includes a separation structure having a resistance greater than a resistance threshold; a positive electrode of the battery and a negative electrode of the battery disposed on two sides of the separation structure; a liquid conductor configured to transport conductive ions between the positive electrode and the negative electrode; a storage structure configured to store supplementary material to release into the liquid conductor; and an enclosure configured to form an enclosed cavity to accommodate the separation structure, the positive electrode, the negative electrode, the liquid conductor, and the storage structure.

According to an embodiment, there are provided a method for manufacturing a battery module for an electric vehicle and a battery module manufactured by the method. The method comprises preparing an electrode assembly, the electrode assembly including a plurality of electrode plates, a plurality of electrode tabs, and a separator, forming a plurality of electrode leads by friction-welding a copper piece and an aluminum piece, attaching a sealing film to each of the plurality of electrode leads, packing the electrode assembly in a pouch case, with the aluminum piece exposed to an outside of the pouch case, injecting an electrolyte into the pouch case, sealing the pouch case to form each of the plurality of battery cells, stacking the plurality of battery cells one over another, and connecting the aluminum pieces of the plurality of battery cells to each other via a sensing bus bar.

According to an embodiment, there are provided a method for manufacturing a battery module for an electric vehicle and a battery module manufactured by the method. The method comprises preparing an electrode assembly, the electrode assembly including a plurality of electrode plates, a plurality of electrode tabs, and a separator, forming a plurality of electrode leads by friction-welding a copper piece and an aluminum piece, attaching a sealing film to each of the plurality of electrode leads, packing the electrode assembly in a pouch case, with the aluminum piece exposed to an outside of the pouch case, injecting an electrolyte into the pouch case, sealing the pouch case to form each of the plurality of battery cells, stacking the plurality of battery cells one over another, and connecting the aluminum pieces of the plurality of battery cells to each other via a sensing bus bar.

An activation method for a lithium secondary battery, and a lithium secondary battery manufactured using the same are disclosed herein. In some embodiments, the method comprises charging a secondary battery, wherein the secondary battery includes a positive electrode having a sacrificial positive electrode material represented by Formula 1 and having an orthorhombic structure, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, and then holding the secondary battery for a predetermined period of time at a voltage of 3.2 V or greater.

A method for charging and discharging a battery, includes, operations of: manufacturing a battery by coupling a battery case and battery electrodes and injecting an electrolyte into the battery case; and activating a battery by inputting a current pulse having a predetermined period to the battery electrodes, wherein the period includes a first time and a second time, equal to or less than the first time, wherein the battery is charged by the current pulse during any one of the first time and the second time, and the battery is discharged by the current pulse during the other one of the first time the second time.

A method for charging and discharging a battery, includes, operations of: manufacturing a battery by coupling a battery case and battery electrodes and injecting an electrolyte into the battery case; and activating a battery by inputting a current pulse having a predetermined period to the battery electrodes, wherein the period includes a first time and a second time, equal to or less than the first time, wherein the battery is charged by the current pulse during any one of the first time and the second time, and the battery is discharged by the current pulse during the other one of the first time the second time.

Disclosed is a battery module with reduced risk of fire propagation or explosion. To achieve the above-described object, the battery module according to the present disclosure includes a cell assembly including a plurality of secondary batteries, a module housing in which the cell assembly is received in an internal space, the module housing having an opening through which the internal space is in communication with an external space, and an adjustment cover configured to cover at least a part of the opening to fill a fire extinguishing agent supplied into the battery module to a predetermined height or above.