SQUARE SECONDARY BATTERY, BATTERY PACK USING THE SAME, AND METHOD FOR MANUFACTURING SQUARE SECONDARY BATTERY

• Main Authors: YAGI HIROMASA, WAKIMOTO RYOICHI, FUJIWARA ISAO, KITAOKA KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 22.12.2016
• 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 square secondary battery having a high volume energy density and excellent in reliability.SOLUTION: An electrode body including a positive electrode plate and a negative electrode plate comprises a positive electrode tab part 4c in an end part of a sealing plate 2 side. A positive electrode collector 6 including a collector body part 6a and a collector connection part 6b1 is electrically connected to the positive electrode plate. A pressure-sensitive current interruption mechanism 40 includes a conductive member 41 having an opening on the electrode body side, a deformation plate 42 sealing the opening, and the collector body part 6a arranged on the electrode body side of the deformation plate 42 and connected to the deformation plate 42. The collector connection part 6b1 is arranged between the current interruption mechanism 40 and one large area sidewall 2b of a square outer package 2, and the positive electrode tab part 4c is connected to the collector connection part 6b1.SELECTED DRAWING: Figure 7 【課題】高い体積エネルギー密度を有し、信頼性に優れた角形二次電池を提供する。【解決手段】正極板及び負極板を含む電極体は封口板２側の端部に正極タブ部４ｃを有し、正極板には集電体本体部６ａ及び集電体接続部６ｂ１を有する正極集電体６が電気的に接続されている。感圧式の電流遮断機構４０は、電極体側に開口部を有する導電部材４１と、この開口部を封止する変形板４２と、変形板４２の電極体側に配置され変形板４２に接続された集電体本体部６ａを含む。集電体接続部６ｂ１は電流遮断機構４０と角形外装体２の一方の大面積側壁２ｂの間に配置され、正極タブ部４ｃは集電体接続部６ｂ１に接続される。【選択図】図７