Assembled Battery and Manufacturing Method Thereof

• US 20080070102A1
• Filed: 05/30/2005
• Published: 03/20/2008
• Est. Priority Date: 05/31/2004
• Status: Active Grant

• Current Assignee: Envision AESC Japan Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Kishimoto, Hiroaki, Ota, Masayasu, Enokida, Tsuyoshi, Watanabe, Masashi, Segawa, Teruo, Amagai, Ryuichi, Tanjou, Yuuji, Hayami, Muneto
• Granted Patent: US 9,246,145 B2
• Time in Patent Office: Days
• US Class Current: 429/91
• 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 10/4207 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/647 Prismatic or flat cells, e.g. pouch cells
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: H01M 10/6557 arranged between the cells
• CPC Class Codes: H01M 10/6566 Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers H01M10/6565 takes precedence
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/211 adapted for pouch cells
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H01M 50/51 Connection only in series
• CPC Class Codes: H01M 50/516 by welding, soldering or brazing
• CPC Class Codes: H01M 50/548 on opposite sides of the cell
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: H01M 6/42 Grouping of primary cells into batteries H01M6/40 takes precedence
• CPC Class Codes: H01M 6/46 of flat cells
• 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: Y10T 29/49108 : Electric battery cell making

Abstract

A combined battery (100) comprising a plurality of flat-type cells (10A to 10F) by laminating thereof so that polarity of electrode tabs (11A to 11F and 12A to 12F) is alternately set, wherein welding parts to connect in series the flat cells themselves, to compose a set when all the flat-type cells (10A to 10F) are laminated, are separated at a plurality of positions of the combined battery, and the flat-type cells having such a structure that all the flat-type cells are electrically connected in series by welding each of the welding parts.

Claims

1. A combined battery comprising a plurality of cells by laminating thereof so that polarity of electrode tabs is alternately set, wherein welding parts of the electrode tabs to connect the cells themselves in series, to compose a set when all the cells are laminated, are separated at a plurality of positions of the combined battery, and having such a structure that all the cells are electrically connected in series by welding each of the welding parts.

2. The combined battery according to claim 1, wherein any of the cells has length of the electrode tab in at least one of the plus side or the minus side thereof, different from that in the other side of the electrode tab, and welding parts of the electrode tabs are separated at a plurality of positions in the length direction of the cells.

3. The combined battery according to claim 1, wherein any of or all of the cells have at least one of the plus side or the minus side of the electrode tabs with a L-character shape, and welding parts of the electrode tabs are separated at a plurality of positions in a vertical direction to a lamination direction.

4. The combined battery according to claim 1, wherein the cells have a circular or polygonal shape viewed from a lamination direction, and are arranged to have specified central angle so that one of the electrode tabs is off set relative to the other electrode tab from diameter with said other electrode tab as a base point.

5. The combined battery according to claim 1, at least a part of the cells among all of the cells are sequentially connected to adjacent cells at the side themselves not having the electrode tab.

6. The combined battery according to claim 1, wherein insulation means to insulate electrode tabs of the cells to compose a set, from other electrode tabs are present inter-the cells.

7. The combined battery according to claim 6, wherein voltage detection terminals to detect voltage of the cells are installed at the one side of the insulation means.

8. A method for producing a combined battery, comprising:

a step for preparing a plurality of units (a, b, c and d) by making an insulating body present inter-the cells to compose a set, and by welding the electrode tabs themselves of the cells;

a step for laminating the cells and the insulating body so that the cells and the insulating body are alternatively laminated in combination of the units (a, b, c and d), the cells themselves and the insulating body, and welding parts of the electrode tabs to connect the cells themselves in series, to compose a combined battery when all the cells are laminated, are separated at different positions; and

a step for welding the welding parts separated at different positions in order.

10. The method for producing a combined battery according to claim 8, wherein any of the cells has length of the electrode tab in at least one of the plus side or the minus side thereof different from that in the other side of the electrode tab.

11. The method for producing a combined battery according to claim 8, wherein any of or all of the cells have at least one of the plus side or the minus side of the electrode tabs with an L-character shape.

9. A method for producing a combined battery, comprising:

a step for preparing the first unit (a to d) by welding electrode tabs themselves of the cells to compose a set;

a step for preparing the second unit (e, f) by welding the first unit itself, by means of welding electrode tabs themselves, not yet bonded among the first unit (a to d), at the position different from that in preparation of the first unit; and

a step for preparation of combined battery by welding electrode tabs themselves of the second unit, not yet bonded among the second unit (e, f), at the position different from that in preparation of the second unit.

12. A method for producing a combined battery, comprising:

a step for laminating a plurality of the cells with a circular or polygonal shape viewed from a lamination direction, and arranged to have specified central angle so that one of the electrode tab is off set relative to the other electrode tab from diameter with said other electrode tab as a base point, so that the plus side electrode tab of each of the cells and the minus side electrode tab of the cells to be laminated thereon overlap; and

a step for welding electrode tabs to compose a set, and protruding independently from different positions at the peripheral part of the cells as a result of lamination, in order.

13. A method for producing a combined battery, comprising:

a step for laminating a series of cells, which are sequentially connected to the cells with adjacent sides themselves having no electrode tabs, wherein the electrode tabs are pulled out from different positions of each of the cells, by folding thereof in zigzags or by winding thereof in a roll shape; and

a step for welding the electrode tabs to compose a combined battery, and protruding independently from different positions as a result of lamination, in order.