Lg Energy Solution, Ltd.

Lg Chem, Ltd

Other

Dae Soo Kim

Dong Kyu Kim

Young Deok Kim

Song Yi Han

Chul Gi Hong

Jae Hyun Lee

Seok Koo Kim

Han Young Lee

Ji Yeon Kim

Jong Keon Yoon

Soon Ju Choi

Hyo Jung Yoon

Su Won Jee

Hyun Jun Choi

An electrode assembly comprises: a first unit electrode in which a plurality of first electrodes entirely made of a first electrode mixture having a solid shape are connected to each other; a second unit electrode in which a plurality of second electrodes entirely made of a second electrode mixture having a solid shape are connected to each other; a separator interposed between the first unit electrode and the second unit electrode; and an electrode tab comprising a plurality of first electrode tab provided on the first unit electrode and a plurality of second electrode tab provided on the second unit electrode.

Method for manufacturing a secondary battery

A method of diagnosing degradation of an electrode active material for a secondary battery including obtaining a first differential curve (dQ/dV) by differentiating an initial charge/discharge curve obtained by performing first charging and first discharging of the lithium secondary battery in a voltage range of 2.5 V to 4.2 V, and obtaining a second differential curve (dQ/dV) by differentiating a charge/discharge curve obtained by performing second charging and second discharging of the lithium secondary battery in a voltage range of 2.5 V to 4.2 V, and diagnosing whether a beta phase of the positive electrode active material has been formed by comparing maximum discharge peak values of the first differential curve and the second differential curve.

Method of diagnosing degradation of electrode active material for lithium secondary battery

A battery charge and discharge control device according to an embodiment of the present disclosure includes a state-of-charge (SOC) measurer measuring a SOC of a battery and a charge and discharge controller controlling a charging speed of the battery in response to the SOC of the battery being included in a preset SOC section, and the preset SOC section has change in resistance or a change in potential due to ions inserted into a material constituting the battery equal to or greater than a reference value.

Battery charge control device and method

The electrode comprises: a plurality of unit electrodes formed by connecting a plurality of electrodes made of an electrode mixture having a solid shape to each other; a separator interposed between the plurality of unit electrodes; and an electrode tab attached to the unit electrode, wherein the electrode tab comprises first and second electrode tabs, which are respectively attached to the unit electrodes and have different specific resistance.

Electrode assembly and comprising connected plurality of unit electrodes

An electrode assembly comprising a first unit electrode in which a plurality of first electrodes entirely made of a first electrode mixture having a solid shape are connected to each other; a second unit electrode in which a plurality of second electrodes entirely made of a second electrode mixture having a solid shape are connected to each other; a separator interposed between the first unit electrode and the second unit electrode; and an electrode tab comprising a plurality of first electrode tab provided on the first unit electrode and a plurality of second electrode tab provided on the second unit electrode.

Secondary battery and method for manufacturing the same

The present invention relates to an electrode assembly. The electrode comprises: a plurality of unit electrodes formed by connecting a plurality of electrodes made of an electrode mixture having a solid shape to each other; a separator interposed between the plurality of unit electrodes; and an electrode tab attached to the unit electrode, wherein the electrode tab comprises first and second electrode tabs, which are respectively attached to the unit electrodes and have different specific resistance.

Electrode assembly and method for manufacturing the same

The present invention relates to a method for analyzing a degree of impregnation of an electrolyte of an electrode in a battery cell, the method comprising: a battery cell manufacturing step (S) of preparing a battery cell by injecting an electrolyte into a battery cell including an electrode to be evaluated; a step of charging/discharging the battery cell several times and obtaining a capacity-voltage profile for each cycle (S); a step of obtaining a differential capacity (dV/dQ) curve obtained by differentiating the capacitance-voltage profile for each cycle with respect to the capacity (S); and a step of, in the differential capacity curve, determining a cycle at which behavior becomes the same as a time point when impregnation is sufficiently performed (S).

Method for precisely analyzing degree of impregnation of electrolyte of electrode in cell

An electrode assembly, in which a plurality of unit electrodes and a plurality of separators are alternately laminated, is provided. Each of the unit electrodes is provided by connecting a plurality of electrodes, each electrode being entirely made of a solid electrode mixture, to each other, and the solid electrode mixture including a mixture of an electrode active material with at least one or more of a conductive material and a binder.

A method for regenerating a cell having an electrode assembly, in which electrodes and a separator are alternately combined with each other, an electrolyte, and a battery case accommodating the electrode assembly and the electrolyte according to the present invention includes performing a negative pressure processing process in which a negative pressure is applied to the cell to allow a gas disposed between the electrodes to move outside the electrode assembly and performing an ultrasonic wave processing process in which the cell is stimulated by ultrasonic waves to allow the electrolyte disposed outside the electrode assembly to move between the electrodes.

Method for regenerating cell

A secondary battery according to the present invention including a battery case with an accommodation part accommodating an electrode assembly and an electrolyte, a fluid inlet/outlet port provided in the battery case to provide a moving passage through which a fluid is movable so that discharge of an inner gas and reinjection of the electrolyte are enabled, a gas discharge part restricting the discharge of the inner gas passing through the fluid inlet/outlet port, and an electrolyte reinjection part provided to reinject the electrolyte through the fluid inlet/outlet port.

Secondary battery

A method for regenerating a lithium secondary battery including a lithium resupply step in which a lithium resupply electrode is provided in the secondary battery, and the positive electrode is set as a counter electrode, and the lithium resupply electrode is set as a working electrode to charge lithium ions to the positive electrode through the lithium resupply electrode and a negative electrode discharging step in which, after the lithium ions are resupplied to the positive electrode through the lithium resupply step, the lithium resupply electrode is set as the counter electrode, and the negative electrode is set as the working electrode to completely discharge the negative electrode up to a discharge limit.

Method for regenerating lithium secondary battery

A method for regenerating an end of life (EOL) cell which comprises an electrode assembly including a cathode, an anode, and a separator interposed between the cathode and the anode, wherein the EOL cell is left under a high temperature environment of 80&#xb0; C. or higher for a predetermined time while pressure is applied thereto, whereby gas located within the electrode assembly is moved to the outer portion of the electrode assembly is provided. The method can regenerate an EOL cell in a simple and economical way without breaking or damaging the same, and furthermore can also be applied to a pack or module which is an extended unit of the cell. A pressuring jig is also provided.

Method for regenerating EOL cell

The secondary battery includes a body part provided in a pillar shape on an outer wall and including a passage, through which the electrolyte flows, therein, a pin switch extending in a longitudinal direction of the body part, wherein, when a pressure is applied to an end of the pin switch, the pin switch linearly moves toward the inside, and when the pressure is removed, the pin switch linearly moves toward the outside, a manipulation part to move in a direction that is parallel to the pin switch, a pressure apply part protruding from a central portion of the manipulation part to apply a pressure an end of the pin switch, and a switching part disposed on the other end of the pin switch to open and close the passage.

Secondary battery having filling valve

The present invention relates to a battery cell refillable with an electrolyte, an electrolyte refilling system for a battery pack configured to include a plurality of battery cells, and an electrolyte refilling method for a battery pack of an electric vehicle.

Battery cell refillable with electrolyte, battery pack, electrolyte refilling system for battery pack, and electrolyte refilling method for battery pack

The present invention relates to a secondary battery and a method for supplementing an electrolyte of the secondary battery. The secondary battery according to the present invention comprises a battery case comprising an accommodation part accommodating an electrode and an electrolyte therein and a sealing member for additionally injecting the electrolyte, which is disposed on a portion of the battery case to additionally inject the electrolyte into the accommodation part of the battery case and seals an injection portion.

Growing community of inventors

Daejeon, South Korea

Dae Soo Kim