JP2012028246A5

JP2012028246A5 -

Info

Publication number: JP2012028246A5
Application number: JP2010167995A
Authority: JP
Filing date: 2010-07-27
Publication date: 2012-08-23
Anticipated expiration: 2030-07-27

Description

請求項１の発明による二次電池は、電力を充放電する捲回群と、開口部を有し、前記捲回群が収納される缶と、前記缶の開口部に溶接されて、前記開口部を封止する蓋と、前記捲回群に電気的に接続され、かつ前記蓋を貫通して、前記蓋の外側に突出する正極接続端子および負極接続端子と、前記蓋の外側で、前記正極接続端子および前記負極接続端子に、それぞれ接続された正極外部端子および負極外部端子と、前記正極外部端子および前記負極外部端子を前記蓋に対して電気的に絶縁する絶縁部材と、前記正極接続端子および前記負極接続端子と、前記蓋との隙間をシールするガスケットとを備え、前記正極接続端子および前記負極接続端子には、前記蓋の外側で拡径されたかしめ部が形成され、前記かしめ部の周縁部には、レーザスポット溶接可能な薄肉平坦部が局所的に形成され、前記薄肉平坦部がレーザスポット溶接されていることを特徴とする。 The secondary battery according to the invention of claim 1 has a winding group for charging and discharging electric power, and an opening which is welded to an opening of the can and the opening of the can having the opening, the opening being the opening A lid for sealing a portion, a positive electrode connection terminal and a negative electrode connection terminal electrically connected to the winding group and penetrating through the lid and projecting outside the lid, and the lid outside the lid A positive electrode external terminal and a negative electrode external terminal respectively connected to a positive electrode connection terminal and the negative electrode connection terminal, an insulating member for electrically insulating the positive electrode external terminal and the negative electrode external terminal from the lid, the positive electrode connection A terminal and the negative electrode connection terminal, and a gasket for sealing a gap between the lid, The positive electrode connection terminal and the negative electrode connection terminal are formed with crimped portions expanded in diameter outside the lid, and the caulking is performed to the periphery of the part, Rezasupo DOO soluble Sekka ability thin-walled flat portion is locally formed, the thin flat portion, characterized in that it is laser spot welding.

Claims

A winding group in which charging and discharging the power,
A can having an opening and the winding group being accommodated;
A lid welded to the opening of the can to seal the opening;
A positive electrode connection terminal and a negative electrode connection terminal which are electrically connected to the winding group and which penetrate the lid and protrude to the outside of the lid;
A positive electrode external terminal and a negative electrode external terminal respectively connected to the positive electrode connection terminal and the negative electrode connection terminal outside the lid;
An insulating member electrically insulating the positive electrode external terminal and the negative electrode external terminal with respect to the lid;
And a gasket sealing a gap between the positive electrode connection terminal, the negative electrode connection terminal, and the lid.
The positive electrode connection terminal and the negative electrode connection terminal are formed with crimped portions expanded in diameter outside the lid,
A peripheral portion of the caulking portion, the thin flat portion of the laser spot soluble Sekka ability is locally formed,
The secondary battery characterized in that the thin flat portion is laser spot welded.

In the secondary battery according to claim 1,
A plurality of the thin flat portions are formed.

In the secondary battery according to claim 2,
The secondary battery characterized in that the thin flat portion is disposed on the side of the positive electrode external terminal and the negative electrode external connection terminal facing the connecting means with another battery.

The secondary battery according to any one of claims 1 to 3.
The said thin flat part is circular, The secondary battery characterized by the above-mentioned.

The secondary battery according to any one of claims 1 to 3.
The said thin flat part is elliptical, The secondary battery characterized by the above-mentioned.