JP2010231945A5

JP2010231945A5 -

Info

Publication number: JP2010231945A5
Application number: JP2009076402A
Authority: JP
Filing date: 2009-03-26
Publication date: 2012-05-17
Anticipated expiration: 2029-03-26

Claims

開口があるケースの前記開口の周りの端に蓋部材の縁が接合されかつ前記ケースの内部にスタック構造の発電要素、正極接続端子、負極接続端子、正極支持部材、負極支持部材および電解液を有し、
前記ケースは、前記開口と平行な方形状の断面を有し、
前記正極接続端子と前記負極接続端子は、それぞれ前記蓋部材に固定され、
前記正極支持部材と前記負極支持部材は、それぞれ前記正極接続端子の端部と前記負極接続端子の端部に固定され、
前記発電要素は、セパレータを介して交互に配置された正極シートおよび負極シートを有し、
前記正極シートは、前記正極接続端子に接続された正極集電体および前記正極集電体上に設けられた正極活物質層を備え、
前記負極シートは、前記負極接続端子に接続された負極集電体および前記負極集電体上に設けられた負極活物質層を備え、
前記正極支持部材および前記負極支持部材は、前記ケースの前記開口に対向する部分である底に直接的または間接的に接触したことを特徴とする二次電池。 The edge of the lid member is joined to the end of the case having an opening, and the power generation element having a stack structure, the positive electrode connection terminal, the negative electrode connection terminal, the positive electrode support member, the negative electrode support member, and the electrolyte are joined to the inside of the case. Have
The case has a rectangular cross section parallel to the opening,
The positive electrode connection terminal and the negative electrode connection terminal are each fixed to the lid member,
The positive electrode support member and the negative electrode support member are fixed to an end portion of the positive electrode connection terminal and an end portion of the negative electrode connection terminal, respectively.
The power generation element has positive electrode sheets and negative electrode sheets alternately arranged via separators,
The positive electrode sheet includes a positive electrode current collector connected to the positive electrode connection terminal and a positive electrode active material layer provided on the positive electrode current collector,
The negative electrode sheet includes a negative electrode current collector connected to the negative electrode connection terminal and a negative electrode active material layer provided on the negative electrode current collector,
The positive electrode supporting member and the negative electrode supporting member, the secondary battery being characterized in that directly or indirectly in contact with the a part amount you face the open bottom of the case.

前記蓋部材は、前記ケースの前記開口の大きさと実質的に同じ大きさを有し、
前記底は、平らな部分を有し、前記底の平らな部分から前記開口までの前記底の平らな部分に対し垂直な方向であるＸ方向の長さは一定であり、
前記正極支持部材および前記負極支持部材は、前記底の平らな部分に直接的または間接的に接触し、前記正極支持部材または前記負極支持部材の前記底の平らな部分に直接的または間接的に接触した部分から前記蓋部材の縁の二次電池の外側の端までの前記Ｘ方向の長さが前記底の平らな部分から前記開口までの前記Ｘ方向の長さと実質的に同じである請求項１に記載の二次電池。 The lid member has substantially the same size as the opening of the case;
The bottom has a flat portion, and the length in the X direction, which is a direction perpendicular to the flat portion of the bottom, from the flat portion of the bottom to the opening is constant;
The positive electrode supporting member and the negative electrode supporting member, directly or indirectly contact with the flat portion of the bottom, directly or indirectly to the flat portion of the bottom of the positive electrode supporting member or the anode supporting member The length in the X direction from the contacted portion to the outer end of the secondary battery at the edge of the lid member is substantially the same as the length in the X direction from the flat portion of the bottom to the opening. Item 11. The secondary battery according to Item 1.

前記正極接続端子、前記負極接続端子、前記発電要素、前記正極支持部材および前記負極支持部材と前記ケースとの間に設けられかつ熱収縮させた絶縁性フィルムをさらに備え、
前記正極支持部材または前記負極支持部材の前記底に間接的に接触した部分から前記蓋部材の縁の二次電池の外側の端までの前記Ｘ方向の長さと前記絶縁性フィルムの厚さとの和が、前記底の平らな部分から前記開口までの前記Ｘ方向の長さと実質的に同じである請求項２に記載の二次電池。 The positive electrode connection terminal, the negative electrode connection terminal, the power generation element, the positive electrode support member and an insulating film provided between the negative electrode support member and the case and further thermally contracted,
The sum of the length in the X direction from the portion of the positive electrode support member or the negative electrode support member that indirectly contacts the bottom to the outer end of the secondary battery at the edge of the lid member and the thickness of the insulating film The secondary battery according to claim 2, wherein is substantially the same as a length in the X direction from the flat portion of the bottom to the opening.

前記正極支持部材および前記負極支持部材は、絶縁体である請求項１〜３のいずれか１つに記載の二次電池。 The secondary battery according to claim 1, wherein the positive electrode support member and the negative electrode support member are insulators.

前記正極接続端子および前記負極接続端子は、それぞれ前記蓋部材とほぼ直交する方向に配置されている請求項１〜４のいずれか１つに記載の二次電池。The secondary battery according to claim 1, wherein the positive electrode connection terminal and the negative electrode connection terminal are arranged in a direction substantially orthogonal to the lid member.

正極集電体および前記正極集電体上に設けられた正極活物質層を備える正極シート並びに負極集電体および前記負極集電体上に設けられた負極活物質層を備える負極シートをセパレータを介して交互に配置しスタック構造の発電要素を形成する工程と、
開口がありかつ前記開口と平行な方形状の断面を有しかつ前記開口に対向する部分である底に平らな部分を有しかつ前記底の平らな部分から前記開口までの前記底の平らな部分に対し垂直な方向であるＸ方向の長さは一定であるケースの前記開口の大きさと実質的に同じ大きさを有する蓋部材に固定された正極接続端子に前記正極集電体を接合し、前記蓋部材に固定された負極接続端子に前記負極集電体を接合する工程と、
前記正極接続端子の端部に正極支持部材を固定し前記負極接続端子の端部に負極支持部材を固定する支持部材固定工程と、
前記発電要素、前記正極接続端子、前記負極接続端子を前記開口を上にして設置した前記ケースに収容し前記正極支持部材および前記負極支持部材を前記底の平らな部分に直接的または間接的に接触させかつ前記蓋部材を前記開口に嵌める工程と、
前記ケースの開口の周りの端と前記蓋部材の縁を接合する工程と、
前記ケース内に電解液を注入する工程とを備え、
前記支持部材固定工程は、前記正極支持部材または前記負極支持部材の前記底の平らな部分に直接的または間接的に接触する部分から前記蓋部材の縁の二次電池の外側の端までの前記Ｘ方向の長さと前記底の平らな部分から前記開口までの前記Ｘ方向の長さとを実質的に同じとする工程である二次電池の製造方法。 A positive electrode sheet comprising a positive electrode current collector and a positive electrode active material layer provided on the positive electrode current collector, and a negative electrode sheet comprising a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector Forming a stack-shaped power generation element alternately arranged through,
The bottom has a square cross section parallel to the opening and has a flat portion at the bottom that is the portion facing the opening, and the bottom flat from the flat portion of the bottom to the opening The positive electrode current collector is joined to a positive electrode connection terminal fixed to a lid member having a size substantially the same as the size of the opening of the case in which the length in the X direction that is perpendicular to the portion is constant. Bonding the negative electrode current collector to the negative electrode connection terminal fixed to the lid member;
A support member fixing step of fixing a positive electrode support member to an end portion of the positive electrode connection terminal and fixing a negative electrode support member to an end portion of the negative electrode connection terminal;
The power generation element, the positive electrode connection terminal, and the negative electrode connection terminal are accommodated in the case installed with the opening facing upward, and the positive electrode support member and the negative electrode support member are directly or indirectly attached to the flat portion of the bottom. Bringing the lid member into contact with the opening;
Joining the edge around the opening of the case and the edge of the lid member;
A step of injecting an electrolyte into the case,
The supporting member fixing step includes the step of directly or indirectly contacting the flat portion of the bottom of the positive electrode supporting member or the negative electrode supporting member to the outer end of the secondary battery at the edge of the lid member. A method of manufacturing a secondary battery, wherein the length in the X direction and the length in the X direction from the flat portion of the bottom to the opening are substantially the same.