Lg Energy Solution, Ltd.

Lg Chem, Ltd

Other

Sk Innovation Co., Ltd.

Sk Geo Centric Co., Ltd.

Ji Hye Park

Song Taek Oh

Su Hyun Kim

Su Rim Lee

Hyeok Moo Lee

Seok Koo Kim

Jung Woo Yoo

Nak Hee Choi

Hyeokmoo Lee

Jae Hyun Lee

Ho Seong Lee

Jeong Ae Ahn

Dongguk Hwang

Jungseok Choi

Jung Seok Choi

Jeong Gil Kim

Hye Youn Lee

Wan Ju Jeong

Dong Guk Hwang

Wontae Joe

Seok Bin Hong

In Su Lee

Won Bin Kim

Discussed is an apparatus for estimating a rechargeable battery performance according to an electrode structure and a method thereof and the apparatus for estimating the rechargeable battery performance. The apparatus may include a communication unit that receives a cumulative intrusion value that is a summed value of volumes of entire pores per unit area of a positive electrode from an apparatus for measuring volumes of pores formed in the positive electrode, and a processor that estimates an output performance of a rechargeable battery by comparing the cumulative intrusion value and a volume reference value, wherein the volume reference value is the cumulative intrusion value corresponding to an expected output value required for the rechargeable battery when the rechargeable battery is continuously discharged.

Apparatus for estimating rechargeable battery performance according to electrode structure and method thereof

A negative electrode and a secondary battery including the negative electrode, the negative electrode includes a negative electrode active material layer containing negative electrode active material particles and an additive. The additive is present in an amount of 1.8 parts by weight to 3.2 parts by weight based on 100 parts by weight of the negative electrode active material particles. The additive includes at least one selected from the group consisting of LiAlTi(PO), wherein 0<m1≤1, LiAlGe(PO), wherein 0<m2≤1, LiLaTiO, wherein 0.2≤m3≤0.05, and LiLaZrO, wherein 0.2≤m4≤0.05 (LATP, LAGP, LLTO, and LLZO, respectively).

Negative electrode and secondary battery including the same

A method for predicting the explosion pressure of a medium- and large-size cell module, according to the present invention, comprises the steps of: (S) deriving a profile (SOC-temperature profile) of the generation temperature according to a state of charge (SOC) of a medium- and large-size cell module to be predicted; (S) mounting a small cell inside an explosion pressure measurement device; (S) overcharging the small cell until an explosion occurs while heating the small cell in the same manner as the SOC-temperature profile derived in step (S); (S) measuring the pressure during the explosion of the small cell; and (S) converting the pressure during the explosion of the measured small cell into pressure of a medium- and large-size cell module.

Explosion pressure prediction system for medium- and large-size cell module, and method for predicting explosion pressure of medium- and large-size cell module

The present invention relates to a method and device for evaluating the thickness-direction dispersion of a binder in a mixture layer of an electrode. The thickness-direction dispersion of the binder in the mixture layer of the electrode can be evaluated through a non-destructive method.

Method and device for evaluating dispersion of binder in electrode mixture layer

Provided are a method for designing an electrode for a lithium secondary battery comprising measuring the electrical conductivity of an electrode with an alternating current to determine whether an electrical path in the electrode has been appropriately formed, and a method for manufacturing an electrode for a lithium secondary battery comprising the same. According to the present invention, it is possible to determine the content of a conductive agent in the electrode using the same.

Method for designing electrode for lithium secondary battery and method for manufacturing electrode for lithium secondary battery comprising the same

The present invention discloses a method for determining dispersibility, comprising (a) selecting two random points (-') of an electrode material layer, (b) finding a difference &#x394;of an absolute value of two voltage values by measuring voltages between the two points (-&#x2032;) in different current directions, (c) selecting two other random points (-&#x2032; to n-n&#x2032;, where n is an integer that is equal to or greater than 2) that are different from two points selected in the process (a) and, and repeating the processes (a) and (b) at least once to find &#x394;to &#x394;n, (d) finding a mean value of differences &#x394;to &#x394;n of the absolute values obtained by repeating the process (b) and the process (c), and (e) finding a standard deviation of &#x394;to &#x394;n from the mean value.

Method for determining dispersibility of electrode material layer

The present invention relates to a gas analysis apparatus for a secondary battery, the gas analysis apparatus being capable of effectively performing quantitative analysis and qualitative analysis of the gas generated up to the ignition or explosion of the secondary battery.

Apparatus for real-time analysis of gas generated inside secondary battery

The present invention relates to a method for determining a section in which generation of internal gas in a second battery accelerates, the method comprising the steps of: measuring a closed circuit voltage (CCV) and an open circuit voltage (OCV) according to the state of charge (SOC) of the secondary battery while charging the secondary battery; deriving a closed circuit voltage (SOC-CCV) profile according to the state of charge and an open circuit voltage (SOC-OCV) profile according to the state of charge; and determining, from the derived SOC-CCV profile and SOC-OCV profile, a section in which the amount of internal gas generated in the secondary battery rapidly increases.

Method for determining section in which generation of internal gas in second battery accelerates

The present invention relates to an apparatus, system, and method for collecting gas generated in a secondary battery, specifically, to an apparatus, system, and method for collecting gas, which allow an operator to collect gas generated inside a secondary battery according to a desired section.

Apparatus, system, and method for collecting gas generated in secondary battery

The present invention relates to a method for measuring the active area of an active material in an electrode, comprising: manufacturing three types of electrodes including a first electrode coated with an electrode mixture including both an electrode active material and a conductive material, a second electrode coated with an electrode mixture which includes the electrode active material as a main ingredient and does not include the conductive material, and a third electrode coated with an electrode mixture which does not include the active material and includes the conductive material as a main ingredient; a cell manufacturing step of manufacturing three types of monocells by using the same types of electrodes; a capacitance measuring step of measuring, from the monocells, capacitance of each electrode used in the monocells; and an active area calculating step of calculating the active area of the electrode active material from the capacitance.

Nondestructive method for measuring active area of active material

A non-aqueous electrolyte solution and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes an HF indicator, and a pouch-type lithium secondary battery includes a pouch case having a transparent identification part for observing the interior of the pouch-type battery from the exterior of the pouch case. Defects generated during the preparation of the secondary battery may be visually identified based on the presence of hydrofluoric acid without disassembling the pouch-type battery.

Non-aqueous electrolyte solution and lithium secondary battery including the same

An electrode mixture of the present invention comprises: an electrode active material; a binder; and a conductive material. When a cross-section of the electrode mixture is imaged such that a pixel filled 100% with a conductive material among a plurality of divided pixels is considered to be a condensed pixel and a value obtained by counting condensed pixels is considered to be the degree of agglomeration, the degree of agglomeration of a conductive material in the electrode mixture in the depth direction of the electrode mixture has a standard deviation less than 3.0. The electrode mixture as described above includes a conductive material uniformly distributed therein and thus has low electrode resistance. Therefore, the electrode mixture can improve output and lifespan properties of a lithium secondary battery to which the electrode mixture has been applied.

Electrode mixture, preparation method thereof, and secondary battery including the same

Provided are a cathode active material composition including an xLiMO.(1&#x2212;x)LiMeOcomposite (where 0&#x3c;x&#x3c;1, and M and Me represent metal ions and may be the same or different from each other) and a conductive polymer material, and a secondary battery including the cathode active material composition in a cathode. Since the conductivity of the secondary battery of the present invention may be improved, the cathode active material composition may improve life characteristics, output characteristics, and rate capability of the secondary battery.

Cathode active material composition and lithium secondary battery including the same

Disclosed are a cathode active material for high voltage lithium secondary batteries and a lithium secondary battery including the same and, more particularly, the present invention relates to a cathode active material for lithium secondary batteries that includes a lithium transition metal oxide having a lithium molar fraction of greater than 1, containing a relative excess of nickel, and having a composition represented by Formula 1 below, wherein the lithium transition metal oxide has a LiMnO-like structure phase:LiNiCoMnMOA&#x2003;&#x2003;(1)

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Daejeon, South Korea

Ji Hye Park