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1. WO2020141947 - SECONDARY BATTERY ACTIVATION METHOD WITH ENHANCED ABILITY TO DETECT LOW VOLTAGE

Publication Number WO/2020/141947
Publication Date 09.07.2020
International Application No. PCT/KR2020/000143
International Filing Date 03.01.2020
IPC
H01M 10/058 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
058Construction or manufacture
H01M 4/139 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
139Processes of manufacture
H01M 4/04 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
04Processes of manufacture in general
H01M 10/44 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
44Methods for charging or discharging
G01R 31/3835 2019.1
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge
382Arrangements for monitoring battery or accumulator variables, e.g. SoC
3835involving only voltage measurements
G01R 31/385 2019.1
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge
385Arrangements for measuring battery or accumulator variables
CPC
G01R 31/3835
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
382Arrangements for monitoring battery or accumulator variables, e.g. SoC
3835involving only voltage measurements
G01R 31/385
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
385Arrangements for measuring battery or accumulator variables
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 10/446
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
44Methods for charging or discharging
446Initial charging measures
H01M 10/48
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
48Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte
H01M 10/615
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
60Heating or cooling; Temperature control
61Types of temperature control
615Heating or keeping warm
Applicants
  • 주식회사 엘지화학 LG CHEM, LTD. [KR]/[KR]
Inventors
  • 이정미 LEE, Jung Mi
  • 배준성 BAE, Joon Sung
  • 성낙기 SUNG, Nak Gi
Agents
  • 김홍균 KIM, Hong Gyun
Priority Data
10-2019-000050703.01.2019KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) SECONDARY BATTERY ACTIVATION METHOD WITH ENHANCED ABILITY TO DETECT LOW VOLTAGE
(FR) PROCÉDÉ D’ACTIVATION DE BATTERIE SECONDAIRE À CAPACITÉ AMÉLIORÉE POUR DÉTECTER UNE BASSE TENSION
(KO) 저전압 검출력이 향상된 이차전지의 활성화 방법
Abstract
(EN)
The present invention relates to a secondary battery activation method comprising: a pre-aging step (S100) 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 (S200) for primarily charging the pre-aged secondary battery to a secondary battery capacity (SOC) of 60% or more; a high-temperature aging step (S300) for aging the primarily charged secondary battery at a high temperature; and a room-temperature aging step (S400) 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. The activation method of the present invention has, by uniformly and stably forming a negative electrode SEI film by primary charging and accelerating the stabilization of the SEI film through high-temperature aging to thereby reduce the voltage drops of good products and improve the variation thereof, the effect of enhancing the ability to detect low-voltage defects.
(FR)
La présente invention porte sur un procédé d’activation de batterie secondaire consistant : en une étape de prévieillissement (S100) destinée à vieillir, à température ambiante, une batterie secondaire comprenant une électrode positive comprenant un matériau actif d’électrode positive, une électrode négative comprenant un matériau actif d’électrode négative, un séparateur disposé entre l’électrode positive et l’électrode négative, et un électrolyte ; une étape de charge (S200) destinée à charger en premier lieu la batterie secondaire prévieillie à une capacité (SOC) de batterie secondaire supérieure ou égale à 60 % ; en une étape de vieillissement à haute température (S300) destinée à vieillir la batterie secondaire chargée en premier lieu à une haute température ; et en une étape de vieillissement à température ambiante (S400) destinée à vieillir, à température ambiante, la batterie secondaire qui a été vieillie à une haute température, l’étape de vieillissement à haute température étant mise en œuvre à une température supérieure ou égale à 60 °C. Le procédé d’activation selon la présente invention a, en formant une pellicule de SEI d’électrode négative de manière stable et uniforme en chargeant en premier lieu et en accélérant la stabilisation de la pellicule de SEI par vieillissement à haute température pour ainsi réduire les chutes de tension de bons produits et améliorer sa variation, l’effet de renforcer la capacité à détecter des défauts de basse tension.
(KO)
본 발명은 이차전지의 활성화 방법에 관한 것으로, 양극 활물질을 포함하는 양극, 음극 활물질을 포함하는 음극, 상기 양극 및 음극 사이에 개재된 분리막 및 전해질을 포함하는 이차전지를 상온에서 숙성시키는 프리-에이징(Pre-aging) 단계(S100); 상기 프리-에이징된 이차전지를 이차전지 용량(SOC)의 60% 이상으로 1차 충전하는 충전 단계(S200); 상기 1차 충전된 이차전지를 고온에서 에이징하는 고온 에이징 단계(S300); 및 상기 고온 에이징된 이차전지를 상온에서 에이징하는 상온 에이징 단계(S400); 를 포함하고, 상기 고온 에이징 단계는 60℃ 이상의 온도에서 수행되는 것을 특징으로 한다. 본 발명의 활성화 방법은, 1차 충전에 의해 음극 SEI 피막을 균일하고 안정하게 형성시키고, 고온 에이징을 통해 SEI 피막 안정화를 가속화 함으로써 양품의 전압 강하량을 감소시키고 산포를 개선해, 저전압 불량의 검출력을 향상시킨 효과가 있다.
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