Lg Energy Solution, Ltd.

Lg Chem, Ltd

Electronics and Telecommunications Research Institute

Dong Hyeuk Park

Yong Nam Kim

Se Hyun Yoon

Beomsu Kim

Sin Young Park

Sung Chul Park

Tae Won Kang

Sang Wook Kim

Dong Myung Kim

Jae Han Jung

Heeyong Kim

Dae Won Lee

Yoon Bong Wi

Sang Jin Woo

Ji Soo Park

Jae Hong Kim

Chung Hee Lee

Jun Wan Kim

Hak Sik Lee

Haksoo Lee

Chang Bum Ahn

Jung Hyun Park

Ki Eun Sung

Chun Ho Kwon

Hyeon Woo Jang

Jeong Ki Kim

Hyun Jin Jeon

Su Ho Jeon

Eung Jin Jang

Jung Jae Lee

Kyeong Deok Moon

Jun Hee Park

Chae Kyu Kim

Hyo Jin Lee

Young Wook Lee

Dae-Won Lee

Kwang Il Lee

In Tae Chun

Nam Hyuck Kim

Beom Su Kim

Young Ho Jeon

Gi Yang

Ju Hyung Kim

Tae Hwan Chung

Hyeon Jin Lee

Sung Jun Jo

Myoung Jin Ko

Hyuk Soo Lee

Il Un Chu

Sung Chui Park

Duck Ki Ahn

Yong Seok Jeong

Byung Hee Lee

Gil Woo Kim

So Yeon Noh

Byung Joo Jeong

A separator sealing device includes: a first sealing unit provided with a sealing tip having a protruding shape to press a separator on an outer surface thereof, the first sealing unit rotating about a first rotation shaft; and a second sealing unit provided with a pressing surface that faces the sealing tip to press the separator on a circumference thereof, the second sealing unit rotating about a second rotation shaft, wherein, when the first sealing unit and the second sealing unit rotate, the sealing tip and the pressing surface press the separator disposed between the first sealing unit and the second sealing unit to perform the sealing of the separator.

Separator sealing device and apparatus for manufacturing unit cell using the same

A pouch molding apparatus and method involves deforming a pouch so that a larger amount of clearance is secured to increase the capacity of the pouch, thereby improving the pouch molding process to increase the depth and capacity of a pouch cup part. The pouch molding apparatus includes a die and a punch. The die has a die groove recessed therein in a shape configured to mold a pouch. The punch is disposed above the die groove, wherein the punch includes a body part configured to be inserted into the die groove together with a pouch film disposed between the die and the punch, and pressing parts are provided on opposite sides of the body part to press the pouch film toward an inner surface of the die groove.

Pouch molding apparatus and method

A sealing apparatus for a secondary battery is disclosed, the sealing apparatus configured to seal a battery case of the secondary battery with an electrode assembly therein. The sealing apparatus comprises: a pair of sealing blocks which press the outer circumferential surface of the battery case; and a heating unit which is provided in the pair of sealing blocks and heat the pair of sealing blocks. The pair of sealing blocks comprise: lead sealing regions configured to press the lead sealing portion of the battery case; and case sealing regions configured to press the case sealing portion of the battery case. The heating unit heats the lead sealing regions and the case sealing regions of the pair of sealing blocks at different temperatures.

Sealing apparatus for secondary battery

An electrode assembly manufacturing apparatus includes a stack table, a separator supply unit, first and second electrode supply units, and a side sealing device. A stack of a first electrode, a second electrode, and a separator between the first and the second electrode are stackable on the stack table. The separator supply unit is configured for supplying the separator to the stack table. The first electrode supply unit is configured for stacking the first electrode on a section of the separator on the stack table. The second electrode supply unit stacks the second electrode on a further section of the separator on the first electrode. A side sealing device heats at least one side surface of the stack.

Assembly manufacturing equipment and method for electrode assembly

A notching mold for molding a non-coated portion of an electrode base material, wherein the non-coated portion, is formed on each of two ends of a coated portion, includes: a main mold having an upper mold and a lower mold, parallel to each other, and are slidable close to or away from each other. A first auxiliary mold having auxiliary upper and lower molds coupled to the upper and lower molds, respectively, is configured so that the non-coated portion on one end of the electrode base material is disposed at a processible position. A second auxiliary mold having auxiliary upper and lower molds coupled to the upper and lower molds, respectively, is configured so that, when the electrode base material is input into the main mold, the non-coated portion on the other end of the electrode base material is disposed at a processible position.

Notching mold

An electrode assembly includes a plurality of electrodes arranged in a stack along a stacking axis with a respective separator portion of an elongated separator sheet positioned between and winding around each of the electrodes in the stack along a serpentine path. An intermediate one of the separator portions may be adhered to an intermediate one of the electrodes such that it would take a peel force in a range from 5 gf to 35 gf per 20 mm width applied to an edge of the intermediate separator portion in order to peel it away from the intermediate electrode at a speed of 100 mm/min along the stacking axis. Moreover, top and bottom ones of the separator portions may each have a value of air permeability from 70 sec/100 ml to sec/100 ml per square inch of the respective separator portion at a pressure of 0.05 MPa and at room temperature.

Electrode assembly

An electrode assembly includes a plurality of electrodes arranged in a stack along a stacking axis with a respective separator portion of an elongated separator sheet positioned between and winding around each of the electrodes in the stack along a serpentine path. The plurality of electrodes include a top electrode positioned at a top of the stack along the stacking axis, and the plurality of electrodes include a bottom electrode positioned at a bottom of the stack. The separator portions in the stack include a top separator portion abutting the top electrode and a bottom separator portion abutting the bottom electrode. The top separator portion and the bottom separator portion each have a value of air permeability from 80 sec/100 ml to 120 sec/100 ml per square inch of the respective separator portion at a pressure of 0.05 MPa and at room temperature.

The present technology relates to a method for connecting electrode sheets in a roll-to-roll process, and the method includes: arranging a flexible connection sheet of a predetermined length between a first electrode sheet and a second electrode sheet; connecting the first electrode sheet to the flexible connection sheet by attaching one side of the first electrode sheet to one side of the flexible connection sheet using a first tape; and connecting the second electrode sheet to the flexible connection sheet by attaching one side of the second electrode sheet to the other side of the flexible connection sheet using a second tape. Further, the present technology relates to an electrode sheet manufactured by manufactured by the method of connecting electrode sheets.

Electrode sheet connection method and electrode sheet

The present invention relates to a method for manufacturing a secondary battery. The method for manufacturing the secondary battery comprises: an electrode preparation step of preparing electrodes, each of which is provided with a coating portion coated with an electrode active material and a non-coating portion that is not coated with the electrode active material; an electrode assembly manufacturing step of alternately stacking the electrodes and separators to manufacture an electrode assembly, wherein the electrodes are stacked so that the non-coating portions overlap each other; a non-coating portion bonding step of bonding the non-coating portions to each other; a display part formation step of forming a display part for setting a cutting point on a surface of the bonded non-coating portion of each of the electrodes; and an electrode tab manufacturing step of cutting the bonded non-coating portion adjacent to the display part to manufacture an electrode tab.

Secondary battery and method for manufacturing the same

An electrode assembly includes a plurality of electrodes arranged in a stack along a stacking axis with a respective separator portion of an elongated separator sheet positioned between and winding around each of the electrodes in the stack along a serpentine path. The plurality of electrodes include a top electrode positioned at a top of the stack along the stacking axis, and the plurality of electrodes include a bottom electrode positioned at a bottom of the stack. The separator portions in the stack include a top separator portion abutting the top electrode and a bottom separator portion abutting the bottom electrode. The bottom electrode may have a thickness along the stacking axis that is from 80% to 120% of a thickness of the top electrode along the stacking axis. Moreover, a maximum thickness of each of the electrodes in the stack may be less than 8.3 mm.

An electrode assembly manufacturing method includes the steps of: assembling an electrode stack; performing a primary heat press operation on the electrode stack; then performing a pre-heating operation on the electrode stack; and then performing a secondary heat press operation on the electrode stack. The pre-heating operation may include applying heat and pressure to the electrode stack for a time period from 10 seconds to 40 seconds under a pressure condition from 0.5 MPa to 2 MPa and under a temperature condition from 50° C. to 85° C. The pressure condition applied in the pre-heating operation may include applying a lower pressure than that applied in the primary and secondary heat press operations. The primary heat press operation may include engaging the electrode stack with a gripper to secure a position of the electrode stack, which gripper may be disengaged from the electrode stack before performing the pre-heating operation.

Manufacturing method for electrode assembly

A method for manufacturing a secondary battery includes a forming step of pressing a pouch sheet by using a press die so that left and right accommodation grooves, which are bilaterally symmetrical to each other and are opened upward, and a bridge connecting the left and right accommodation grooves to each other are formed in the pouch sheet, wherein the bridge protrudes upward with respect to bottom surfaces of the left and right accommodation grooves, and a curved portion having a rounded shape is formed on an upper end of the bridge, a seating step of seating an electrode assembly in one of the left and right accommodation grooves, and a folding step of folding the pouch sheet so that the left and right accommodation grooves face each other.

Method for manufacturing secondary battery and pouch for secondary battery

An electrode assembly manufacturing method includes the steps of: assembling an electrode stack; performing a primary heat press operation on the electrode stack while engaging the electrode stack with a gripper; and then performing a secondary heat press operation on the electrode stack while the gripper is disengaged from the electrode stack. The secondary heat press operation may include applying heat and pressure to the electrode stack for a time period from 5 seconds to 60 seconds under a temperature condition from 50° C. to 90° C. and under a pressure condition from 1 Mpa to 6 Mpa. The step of assembling the electrode stack may include alternately stacking first and second electrodes on an elongated separator sheet, and sequentially folding the separator sheet over a previously-stacked one of the electrodes before a subsequent electrode is stacked. An apparatus for performing the manufacturing method is also disclosed.

Manufacturing method for electrode assembly and electrode assembly manufacturing equipment

Growing community of inventors

Daejeon, South Korea

Dong Hyeuk Park