INSPECTION METHOD OF ELECTROCHEMICAL ELEMENT, AND MANUFACTURING METHOD FOR ELECTROCHEMICAL ELEMENT

• Main Author: KAMIKAWA YUKI
• Format: Patent
• Language: English; Japanese
• Published: 02.03.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide an inspection method of an electrochemical element capable of achieving effective removal of displacement bubbles, produced by transportation of nonaqueous electrolyte in a first flow path group, and blocking transportation of nonaqueous electrolyte in a second flow path group.SOLUTION: An inspection method of an electrochemical element has a step (a1) for determining transportation completion in a first flow path group of a nonaqueous electrolyte supplied to a laminate, out of the first flow path groups 71, 72 consisting of the spaces formed, respectively, between the interfaces of a separator 17 and a positive electrode active material layer 15 and a negative electrode active material layer 13, and a second flow path group consisting of the cavities 33 between positive electrode active material particles 31 in the positive electrode active material layer, the cavities 43 between negative electrode active material particles 41 in the negative electrode active material layer, and holes 31, 41, 61 in the positive electrode active material particles, the negative electrode active material particles and the separator, based on a change in the rate of increase of supersonic wave transmittance of the electrochemical element.SELECTED DRAWING: Figure 3 【課題】第１流路群における非水電解液の輸送により生じた、第２流路群における非水電解液の輸送を阻害する置換気泡の排出除去を効果的に実現可能な電気化学素子の検査方法を提供する。【解決手段】セパレータ１７と正極活物質層１５および負極活物質層１３とのそれぞれの界面間に形成された空間からなる第１流路群７１、７２、ならびに、正極活物質層内の正極活物質粒子３１間の空隙３３、負極活物質層内の負極活物質粒子４１間の空隙４３、および、正極活物質粒子内、負極活物質粒子内、およびセパレータ内の空孔３１、４１、６１からなる第２流路群、のうち、積層体に供給された非水電解液の第１流路群における輸送完了を、電気化学素子の超音波透過率の増加率の変化に基づいて判定する段階（ａ１）を有する。【選択図】図３