POWER STORAGE DEVICE

• Main Authors: MINAGATA ATSUSHI, OKUDA MOTOAKI
• Format: Patent
• Language: English; Japanese
• Published: 25.04.2016
• 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 a power storage device, the junction of a battery case of which is not broken even if a battery assembly expands, by making a surface pressure act equally for an electrode assembly in the battery case.SOLUTION: A case body 35 of a battery case 11 has a cylindrical wall 40 including an opening side end, and a bottom wall 41 provided at an end on the opposite side of the opening side end. The cylindrical wall 40 includes a pair of first sidewalls 42 abutting against the end face of a battery assembly in the lamination direction, and arranged in parallel with each other, and a pair of second sidewalls perpendicular to the pair of first sidewalls 42, and arranged in parallel with each other. The first sidewalls 42 includes an opening side ramp 46 extending from the opening side toward the bottom wall 41, and inclining for the housing direction of the electrode assembly 12, a bottom side ramp 47 extending from the bottom wall 41 side toward the opening side, and an intermediate part 48 formed between opening side ramp 46 and bottom side ramp 47, and making the interval of the pair of first sidewalls 42 constant. The end face of the electrode assembly 12 in the lamination direction abuts against the intermediate part 48.SELECTED DRAWING: Figure 4 【課題】電池ケース内の電極組立体に対して面圧を均等に作用させ、電極組立体が膨張しても電池ケースの接合部が破断しない蓄電装置の提供にある。【解決手段】電池ケース１１のケース本体３５は、開口側端部を備える筒状壁４０と、開口側端部の反対側となる端部に設けた底壁４１と、を有し、筒状壁４０は、電極組立体の積層方向の端面に当接し、互いに平行に配置される一対の第１側壁４２と、一対の第１側壁４２と直交し、互いに平行に配置される一対の第２側壁と、を備える。第１側壁４２は、開口側から底壁４１側へ向けて延在し、電極組立体１２の収容方向に対して傾斜する開口側傾斜部４６と、底壁４１側から開口側へ向けて延在する底側傾斜部４７と、開口側傾斜部４６と底側傾斜部４７の間に形成され、一対の第１側壁４２の間隔を一定とする中間部４８とを備え、電極組立体１２の積層方向の端面は中間部４８に当接した。【選択図】 図４