US 11,081,752 B2Granted

Square secondary battery and method of manufacturing same

AssigneeSanyo Electric Co., Ltd.

InventorsYohei Muroya, Shinichirou Yoshida, Hiroshi Maesono

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Abstract

A square secondary battery includes an electrode body including a positive electrode plate and a negative electrode plate, a square outer package housing the electrode body, a metal sealing plate sealing an opening of the square outer package, and a positive electrode collector electrically connected to the positive electrode plate and the sealing plate. The positive electrode collector includes a base portion disposed to oppose the sealing plate, and a lead portion extending from an edge portion of the base portion towards the electrode body. In a short direction of the sealing plate, a boundary between the base portion and the lead portion is positioned on a first side with respect to a center of the sealing plate, and a connection between the sealing plate and the base portion of the positive electrode collector is offset to a second side with respect to the center of the sealing plate.

Claims10

Dependent claims

A square secondary battery comprising:

an electrode body that includes a first electrode plate and a second electrode plate;
a square outer package that includes an opening and that houses the electrode body;
a sealing plate that seals the opening;
and
a collector connected to the first electrode plate,
wherein the collector includes
a base portion disposed to oppose the sealing plate, and
a lead portion that extends from an edge portion of the base portion towards the electrode body,
wherein the sealing plate and the base portion are connected to each other,
wherein in a short direction of the sealing plate, a boundary between the base portion and the lead portion is positioned on a first side with respect to a center of the sealing plate, and a connection between the sealing plate and the base portion is offset to a second side with respect to the center of the sealing plate, and
wherein the connection between the sealing plate and the base portion overlaps the boundary between the base portion and the lead portion in the short direction of the sealing plate.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/814,742Filed 16 Nov 2017
Priority: JP JP2016-24795321 Dec 2016
Published: US 2018/0175334 A121 Jun 2018
Granted: 3 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H01M 50/534
Electrode connections inside a battery casing: characterised by the material of the leads or tabs
H01M 50/15
Characterised by their shape: for prismatic or rectangular cells
H01M 50/169
Characterised by the methods of assembling casings with lids: by welding, brazing or soldering
H01M 50/528
Current conducting connections for cells or batteries: fixed electrical connections, i.e. not intended for disconnection