Lg Chem, Ltd

Lg Energy Solution, Ltd.

Future Metal Corporation

Joon Sung Bae

Nak Gi Sung

Beom Koon Lee

Suk Hyun Hong

Dong Hun Bae

Ki Young Lee

Eui Kyung Lee

Hyo Jin Park

Byoung Hoon Ahn

Sang Jih Kim

So Hee Kim

Chang-Wan Koo

Keun Yung Im

Jae Bin Chung

Young Taek An

Young Soo Kim

Sung Tae Kim

Cha Hun Ku

Soon Ho Ahn

Duk Hyun Ryu

Chang Wan Koo

Soo Hyun Ha

Sei Lin Yoon

Young Tack An

Jens M Paulsen

Hong-Kyu Park

Sung Min Hwang

Sung Hoon Yu

Ki-Young Lee

Gyu Ok Hwang

Joon Sup Kang

In Young Cha

Jin Woo Heo

Dae Bong Lim

Jung Mi Lee

Ju Kyung Shin

Do Hwa Jung

Seung Youn Choi

Moon Kyu Cho

Hyojin Park

Hyun Won Lee

Eun-Young Goh

Mun Ju Kim

Seo Jae Lee

Jaeup Jang

Jens Martin Paulsen

Sung-Tae Kim

Byung Gi Jeon

Nak-Gi Sung

Yong Bum Park

Ho Kyung Byun

Chang Sung Ha

Munju Kim

The present invention provides a gas removing device, which removes a gas generated inside a pouch, in which an electrode assembly is accommodated. The gas removing device includes a pair of vacuum tubes configured to press opposing surfaces of a pouch so as to form a vacuum surface on the pouch; a heating member provided on a pressing surface of each of the vacuum tubes, which presses the pouch, is configured to seal only a portion of an edge of the vacuum surface so as to form a sealed part and an unsealed part; a cutting member configured to cut the vacuum surface of the pouch and form a cutoff hole; and a gas discharging member configured to discharge a gas from inside the pouch to the outside through the unsealed part, the cutoff hole, and the vacuum tubes.

Gas removing device and method for removing gas from a pouch type case of a secondary battery

A secondary battery charging method includes a step for introducing a plurality of battery cells onto an activation tray and CC-charging the battery cells; and a step for connecting the plurality of battery cells in parallel. The charging method shortens the time typically required for CV-charging by connecting battery cells in parallel after CC-charging, thus having the effect of replacing CV-charging.

Method of battery cell activation using activation tray

The present invention comprises: a pre-aging step for aging, at room temperature, a secondary battery comprising a cathode including a cathode active material, an anode including an anode active material, a separator interposed between the cathode and the anode, and an electrolyte (S); a first charging step for primarily charging the pre-aged secondary battery to an SOC of the secondary battery of 60% or higher (S); a high-temperature aging step for aging the primarily charged secondary battery at a high temperature (S); and a room-temperature aging step for aging the high-temperature aged secondary battery at room temperature (S), wherein the room-temperature aging step comprises a resetting process for charging the secondary battery to the same SOC as in the first charging step.

Secondary battery formation method

A secondary battery activation method includes a pre-aging step for aging, at room temperature, a secondary battery comprising a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material, a separator disposed between the positive electrode and the negative electrode, and an electrolyte; a charging step for primarily charging the pre-aged secondary battery to 60% or more of state of charge (SOC) of the secondary battery; a high-temperature aging step for aging the primarily charged secondary battery at a high temperature; and a room-temperature aging step for aging, at room temperature, the secondary battery which has been aged at a high temperature, wherein the high-temperature aging step is performed at a temperature of 60° C. or higher.

Secondary battery activation method with enhanced ability to detect low voltage

A degassing apparatus for a secondary battery, and a degassing method using same, is provided. The degassing apparatus includes a drive motor and a jig arm configured to pressurize a first surface of a gas pocket of a battery cell and a second surface opposite the first surface by controlling a separation distance by the operation of a driving motor. The degassing apparatus is capable of performing an effective degassing and sealing process for the battery cell without positional movement of the battery cell during cell activation or after cell activation.

Gas removal device for secondary battery, and gas removal method using same

A pressing jig for removing gas generated in an activation process of a battery cell includes a plate-shaped lower plate on which the battery cell that has undergone the activation process is placed and fixed, and an upper plate that presses the battery cell placed on the lower plate from above. At least one of the upper plate or the lower plate has a structure in which n (n≥3) separated sub-plates are assembled to form a single plate, and the sub-plates independently press the battery cell. The pressing jig can suppress trapping of internal gas by sequentially pressing the battery cell.

Pressing jig for removing gas trap and method for manufacturing secondary battery using same

A secondary battery charging method that shortens charging time includes a step for introducing a plurality of battery cells onto an activation tray and CC-charging the battery cells; and a step for connecting the plurality of battery cells in parallel. The charging method according to the present invention shortens the time typically required for CV-charging by connecting battery cells in parallel after CC-charging, thus having the effect of replacing CV-charging.

Secondary battery charging method that shortens charging time

The present invention relates to a method for activating a secondary battery. The present invention comprises: a primary charging step of charging a secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte; a room temperature-aging step of storing, at a room temperature, the secondary battery that has undergone the primary charging step; and a high temperature-aging step of storing, at a high temperature, the secondary battery that has undergone the room temperature-aging step, wherein charging/discharging is performed by alternately applying + current and − current to the secondary battery at the end of the primary charging step. The method for activating a secondary battery according to the present invention includes alternately applying + current and − current to the secondary battery at the end of the primary charging step to stabilize an SEI film, thereby shortening a following-up aging time.

Method for activating secondary battery

The present invention is a method for manufacturing a secondary battery. An electrode assembly and an electrolyte are accommodated into a body of a battery case. The body of the battery case has an accommodation part and a gas pocket part, and a passage that extends from the accommodation part to the outside discharges an internal gas from the accommodation part through the gas pocket part. The battery case is seated in a seating step on a support block, which has an inclined part on a side surface thereof, to support the battery case. The body is pressed to discharge a gas accommodated in the accommodation part through the gas pocket part in the battery case. This method allows easy discharging of internal gas while reducing discharge of the electrolyte with the gas.

Method for manufacturing secondary battery

An electrode includes a unit body stack part formed by stacking at least one basic unit having a four-layer structure in which a first electrode, a first separator, a second electrode and a second separator are sequentially stacked. Each surface of the first separator and the second separator is coated with a coating material having adhesiveness, and the basic unit adheres to an adjacent radial unit in the unit body stack part. The electrode assembly of allows a heating and pressing process to be performed prior to a primary formation process so that a separator of one basic unit and a first electrode of the other basic unit to be adhered and fixed by a coating material coated on the separator, and thus a bending phenomenon caused by a difference in electrode expansion rates in a charging/discharging process is prevented.

Stack type electrode assembly in which bending phenomenon is alleviated, and manufacturing method therefor

An apparatus for inspecting defects of a secondary battery having a pair of pressing jigs which press an outer surface of an electrode or a pouch accommodating the electrode assembly in directions corresponding to each other and on which a plurality of protrusions protrude from pressing surfaces and a measurement unit measuring one or more of current, a voltage, and resistance of the electrode assembly when the electrode assembly is pressed by the plurality of protrusions of the pair of pressing jigs is provided.

Apparatus and method for inspecting defect of secondary battery

A device for charging and discharging a battery cell capable of suppressing a swelling phenomenon of a terrace portion of a battery cell during a formation process of the battery cell includes first and second plates configured to receive a battery cell therebetween and to press two surfaces of the battery cell; first and second grippers connected to the first and second plates, respectively, the first and second grippers protrude to face each other and configured to contact a lead region of the battery cell; and first and second pressing pads positioned inward of the first and second grippers, the first and second pressing pads being configured to contact a terrace region of the battery cell. A method of charging and discharging a battery cell using the same is also provided.

Device for charging and discharging a battery cell and method of charging and discharging battery cell using the same

A method for manufacturing a cylindrical battery having multiple tabs is provided in which the cylindrical battery includes an electrode assembly, a cylindrical pouch case, an electrode tab protruding to an upper end of the electrode assembly, and an electrode lead welded and electrically connected to the electrode tab, with the electrode tab being plural. The method includes disposing the plurality of electrode tabs on the electrode assembly; winding the electrode assembly into a cylindrical shape; connecting the electrode lead to the plurality of electrode tabs disposed on the upper end of the electrode assembly; inserting the electrode assembly into the cylindrical pouch case to produce a battery cell; connecting, to the cylindrical pouch case, a gas collecting part for collecting gas generated due to charging and discharging of the electrode; and forming a guide part for preventing deformation of the battery cell in the cylindrical pouch case.

Method for manufacturing cylindrical battery having multiple tabs and cylindrical battery manufactured using the same

A jig for pressing a gas analysis monocell according to the present invention comprises: a first plate and a second plate which face each other with a monocell therebetween; a first auxiliary pad positioned between the first plate and the monocell; and a second auxiliary pad positioned between the second plate and the monocell, wherein the first plate and the second plate are formed of a thermosetting resin. When analyzing a gas generated from the monocell during a primary charge, the jig for pressing the monocell according to the present invention presses the thin monocell to prevent a gap from forming between electrodes due to the primary charge, and thus has an effect of deriving more reliable analysis results.

Jig for pressing gas analysis monocell, and gas analysis device including same

Growing community of inventors

Daejeon, South Korea

Joon Sung Bae