INSPECTION METHOD FOR BATTERY AND MANUFACTURING METHOD FOR BATTERY

• Main Author: IWASE KOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 17.11.2014
• 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 an inspection method for a battery capable of properly discriminating a battery in which foreign matters have not entered in a semi-cylindrical end of an electrode body, and to provide a manufacturing method for a battery in which foreign matters have not entered in a semi-cylindrical end.SOLUTION: An inspection method for a battery 1 which includes: a wound electrode body 10 whose cross-section PJ is an elliptical shape; and a battery case 20 housing the electrode body inside thereof is provided. The electrode body has semi-cylindrical ends 10R located on both ends of an elliptical shape in a major axis direction DM and an intermediate portion 10S located between the semi-cylindrical ends 10R. The inspection method includes: a first compression step for compressing the semi-cylindrical ends in a minor axis direction DN and compressing the electrode body in the major axis direction through the battery case from outside the battery case; a first placing step for placing the battery while the semi-cylindrical ends being compressed in a minor axis direction and the electrode body being compressed in the major axis direction; and a first voltage measuring step for measuring a voltage V between terminals of the battery after the first placing step. 【課題】電極体の半円筒状端部に異物の混入がない電池を適切に判別できる電池の検査方法、半円筒状端部への異物の混入がない電池を製造する電池の製造方法を提供する。【解決手段】横断面ＰＪが長円形状をなす捲回型の電極体１０と、この電極体を内部に収容した電池ケース２０とを備える電池１の検査方法であって、電極体は、長円形状の長径方向ＤＭの両端にそれぞれ位置する半円筒状端部１０Ｒと、半円筒状端部１０Ｒの間に位置する中間部１０Ｓとを有し、電池ケースの外部から電池ケースを介して、半円筒状端部を短径方向ＤＮに圧縮すると共に電極体を長径方向に圧縮する第１圧縮工程と、半円筒状端部を短径方向に圧縮すると共に電極体を長径方向に圧縮した状態で、電池を静置する第１静置工程と、この第１静置工程の後、電池の端子間電圧Ｖを測定する第１電圧測定工程とを備える。【選択図】図３