POWER STORAGE DEVICE

• Main Author: MURAKAWA AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 19.01.2017
• 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 a power storage device which has a lithium electrode as a lithium ion supply source and in which electrolytic solution is impregnated into the entire area of a lithium foil and a lithium ion doping amount of a negative electrode is made uniform when pre-doping is performed in the power storage device.SOLUTION: A power storage device 1 includes an electrode unit 8 having a plurality of laminated positive electrodes 5 and negative electrodes 4, a lithium electrode 7 having a lithium foil 7b arranged so as to face the outermost layer of the laminate, and external connection tabs (3a, 3b) protruding outwards from the end portions of the positive electrodes 5 and the negative electrodes 4, and an outer packaging bag 2 for enclosing the electrode unit 8. The power storage device 1 seals two sides located at both end portions of the outer packaging bag 2 in the tab protruding direction, and one side located at the end portion in an electrolytic solution injection direction, and electrolytic solution is injected from the other one side located at the end portion in the electrolytic solution injection direction to impregnate the electrode unit 8 with the electrolytic solution, thereby manufacturing the power storage device 1. A plurality of grooves extending along the entire length in the electrolytic solution injection direction are juxtaposed with one another on the surface of the lithium foil 7b.SELECTED DRAWING: Figure 2 【課題】リチウムイオンの供給源としてのリチウム極を備える蓄電デバイスにおいてプレドープを行う場合に、電解液がリチウム箔の全域に含浸し、負極のリチウムイオンドープ量を均一にすることが可能な蓄電デバイスを提供する。【解決手段】蓄電デバイス１は、複数積層された正極５及び負極４、その最外層に対向するように配置されたリチウム箔７ｂを有するリチウム極７、並びに正極５及び負極４の端部から外方向に突出する外部接続用タブ（３ａ、３ｂ）を有する電極ユニット８と、電極ユニット８を封入する外装袋２とを備える。蓄電デバイス１は、タブ突出方向の外装袋２の両端部に位置する２辺及び電解液注入方向の端部に位置する１辺を封止し、電解液注入方向の端部に位置する他の１辺から電解液を注入して電極ユニット８に含浸させることによって作製される。リチウム箔７ｂの表面には、電解液注入方向の全長に亘って延在する溝が複数並設されている。【選択図】図２