STACK TYPE BATTERY

• US 20110070477A1
• Filed: 09/16/2010
• Published: 03/24/2011
• Est. Priority Date: 09/18/2009
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Maeda, Hitoshi, Shinyashiki, Yoshitaka, Fujiwara, Masayuki, Funahashi, Atsuhiro
• Application Number:
  US12/883,771
• Publication Number:
  US 20110070477A1
• Time in Patent Office: Days
• US Class Current: 429/152
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/0459 Cells or batteries with folded separator between plate-like electrodes
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 4/1391 of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/1393 of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: H01M 50/536 characterised by the method of fixing the leads to the electrodes, e.g. by welding
• CPC Class Codes: H01M 50/54 Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• CPC Class Codes: H01M 50/562 characterised by the material
• CPC Class Codes: H01M 50/566 by welding, soldering or brazing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A penetrating portion (15P) is provided partially at a location in a positive electrode current collector terminal (15) to which positive electrode lead tabs (11) (electrode plate lead tabs) are joined, to form a current-collector-terminal-absent region (penetrating portion (15P)) and a current-collector-terminal-present region that are aligned in a perpendicular direction (a widthwise direction) to a connection direction of the positive electrode lead tabs (11). Only the plurality of the positive electrode lead tabs (11) are joined at a center weld point (32M) (first joining spot) in the current-collector-terminal-absent region, and the positive electrode lead tabs (11) are joined to the positive electrode current collector terminal 15 at each of left-side and right-side weld points 32L and 32R (second joining spot) in the current-collector-terminal-present region.

Claims

1. A stack type battery comprising:

a plurality of positive electrode plates each having an electrode plate lead tab;

a plurality of negative electrode plates each having an electrode plate lead tab;

a plurality of separators; and

positive and negative electrode current collector terminals, the positive and negative electrode plates being alternately stacked one on the other with the separators interposed therebetween, and a plurality of the electrode plate lead tabs being stacked and joined respectively to the positive and negative electrode current collector terminals, wherein

each of the current collector terminals has a penetrating portion, provided partially at a location thereof to which the electrode plate lead tabs are joined, so as to form a current-collector-terminal-absent region and a current-collector-terminal-present region aligned along a direction perpendicular to a connection direction of the electrode plate lead tabs; and

only the plurality of electrode plate lead tabs are joined to each other at a first joining spot in the current-collector-terminal-absent region, and the electrode plate lead tabs are joined to a respective one of the current collector terminals at a second joining spot in the current-collector-terminal-present region.

2. The stack type battery according to claim 1, wherein joining at at least one of the first joining spot and the second joining spot is effected by ultrasonic welding.

3. The stack type battery according to claim 1, wherein joining at at least one of the first joining spot and the second joining spot is effected at a plurality of points.

4. The stack type battery according to claim 1, wherein joining at at least one of the first joining spot and the second joining spot is effected at a plurality of points.

5. The stack type battery according to claim 1, wherein at least one of the current collector terminals and the electrode plate lead tabs is bent in a direction perpendicular or substantially perpendicular to the connection direction of the electrode plate lead tabs.

6. The stack type battery according to claim 2, wherein at least one of the current collector terminals and the electrode plate lead tabs is bent in a direction perpendicular or substantially perpendicular to the connection direction of the electrode plate lead tabs.

7. The stack type battery according to claim 3, wherein at least one of the current collector terminals and the electrode plate lead tabs is bent in a direction perpendicular or substantially perpendicular to the connection direction of the electrode plate lead tabs.

8. The stack type battery according to claim 1, being a lithium-ion battery.

9. The stack type battery according to claim 2, being a lithium-ion battery.

10. The stack type battery according to claim 3, being a lithium-ion battery.

11. The stack type battery according to claim 4, being a lithium-ion battery.