METHOD FOR MANUFACTURING LAMINATE SECONDARY BATTERY

• Main Author: AMANO JUNKO
• Format: Patent
• Language: English; Japanese
• Published: 09.11.2022
• 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

To provide a method for manufacturing laminate secondary batteries, capable of uniformly impregnating an electrode body with an electrolyte even if the electrode body is large.SOLUTION: A manufacturing method disclosed herein includes: a step (S110) of accommodating a large electrode body in a laminate outer package, the large electrode body including at least a positive electrode and a negative electrode and having an electrode area of 20 cm×40 cm or more; a step (S120) of injecting an electrolyte into an internal space of the laminate outer package in which the large electrode body is accommodated, and building a laminate battery; and a step (S130) of impregnating the large electrode body with the electrolyte. The electrolyte impregnation step includes: processing to leave the laminate battery injected with the electrolyte still for two hours or more; processing to initially charge the laminate battery after having been left still; and processing to repeat a charge/discharge cycle at least 4 or more times with respect to the laminate battery after having being initially charged.SELECTED DRAWING: Figure 2 【課題】大型の電極体であっても、均一に電解液を含浸させるラミネート型二次電池の製造方法を提供すること。【解決手段】ここに開示される製造方法は、少なくとも正極および負極を備え、かつ、電極面積が２０ｃｍ×４０ｃｍ以上である大型電極体をラミネート外装体に収容する工程（Ｓ１１０）；前記大型電極体が収容されたラミネート外装体の内部空間に電解液を注液して、ラミネート型電池を構築する工程（Ｓ１２０）；前記大型電極体に前記電解液を含浸させる工程（Ｓ１３０）；を包含する。前記電解液含浸工程には、前記電解液が注液されたラミネート型電池を２時間以上静置する処理と、前記静置後のラミネート型電池を初期充電する処理と、前記初期充電後のラミネート型電池に対して少なくとも４回以上充放電サイクルを繰り返す処理と、が含まれる。【選択図】図２