BATTERY MANUFACTURING METHOD

• Main Authors: IKEDA HIROAKI, SHIMURA YOSUKE, OTOMO TAKUYA, SUMI TOMOHIDE
• Format: Patent
• Language: English; Japanese
• Published: 24.05.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a battery manufacturing method capable of shortening a time period from the end of an initial charging process to the measurement of an IV resistance value Ra and appropriately measuring the IV resistance value Ra.SOLUTION: A manufacturing method of a battery 1 includes an initial charging step S2 of initially charging the battery 1 up to a first battery voltage V1, a discharging step S3 of discharging the battery 1 up to a second battery voltage V2 after the initial charging step S2, a recharging step S4 of recharging the battery 1 up to a third battery voltage V3 lower than the first battery voltage V1 (V2<V3<V1) after the discharging step S3, and an IV resistance inspection step S5 of obtaining an IV resistance value Ra of the battery 1 after the recharging step S4 and determining whether the battery 1 is good or bad on the basis of the IV resistance value Ra.SELECTED DRAWING: Figure 5 【課題】初充電工程の終了時からＩＶ抵抗値Ｒａを測定するまでの期間を短くできると共に、ＩＶ抵抗値Ｒａを適切に測定できる電池の製造方法を提供すること。【解決手段】電池１の製造方法は、電池１を第１電池電圧Ｖ１まで初充電する初充電工程Ｓ２と、初充電工程Ｓ２の後、電池１を第２電池電圧Ｖ２まで放電させる放電工程Ｓ３と、放電工程Ｓ３の後、電池１を第１電池電圧Ｖ１よりも低い第３電池電圧Ｖ３（Ｖ２＜Ｖ３＜Ｖ１）まで再充電する再充電工程Ｓ４と、再充電工程Ｓ４の後、電池１のＩＶ抵抗値Ｒａを取得し、このＩＶ抵抗値Ｒａに基づいて、当該電池１の良否を判定するＩＶ抵抗検査工程Ｓ５とを備える。【選択図】図５