Electrochemical accumulator with packaging comprising at least one polyaryletherketone (PAEK) sheet, sheet and associated manufacturing methods

• US 9,281,502 B2
• Filed: 01/31/2011
• Issued: 03/08/2016
• Est. Priority Date: 02/02/2010
• Status: Active Grant

• Current Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Original Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Inventors: Giroud, Nelly, Rouault, Helene, Solan, Sebastien
• Primary Examiner(s): Ruddock, Ula C
• Assistant Examiner(s): VAN OUDENAREN, MATTHEW W
• Application Number:
  US13/576,088
• Publication Number:
  US 20120328931A1
• Time in Patent Office: 1,863 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: H01M 50/133 Thickness
• CPC Class Codes: H01M 50/176 for prismatic or rectangular cells H01M50/181 takes precedence
• CPC Class Codes: H01M 50/55 on the same side of the cell
• CPC Class Codes: H01M 50/553 Terminals adapted for prismatic, pouch or rectangular 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 29/49865 by temperature differential [e.g., shrink fit]

Abstract

The invention concerns a new flexible or rigid packaging for an electrochemical accumulator (A).

It is made from at least one polyaryletherketone (PAEK) sheet, notably a polyetheretherketone (PEEK™) sheet.

According to a preferred embodiment, a polyaryletherketone (PAEK) sheet (6.1, 6.2, 6.3, 61) incorporates within it at least one metal stud (40, 50) constituting one of the poles of the accumulator. The main application sought is the packaging of lithium-ion accumulators.

Claims

1. An electrochemical accumulator, comprising:

an electrochemical cell; and

a sealed package incorporating the electrochemical cell;

wherein

the electrochemical cell comprises;

an anode connected to a first current collector;

a metal stud welded to the first current collector traversing the sealed package;

a cathode connected to a second current collector;

a metal stud welded to the second current collector traversing the sealed package; and

an electrolyte,

wherein

the sealed package consists of a single polyaryletherketone (PAEK) sheet folded into two portions and directly attached to one another at their periphery, and each metal stud extends through the sealed package to the thickness of the PAEK sheet and does not protrude beyond a surface plane of the sealed package.

2. The electrochemical accumulator of claim 1, wherein both portions of the PAEK sheet folded into two are directly attached to one another by self-adhesion, bonding, ultrasound, laser, or by heat sealing.

3. The electrochemical accumulator of claim 1, which is a lithium-ion accumulator.

4. A method for manufacturing the electrochemical accumulator of claim 1, the method comprising:

A) forming an opening within a polyaryletherketone (PAEK) sheet;

B) freezing a metal bar to reduce a straight section of the metal bar to dimensions smaller than those of the opening in the sheet;

C) introducing the frozen bar into the opening of the sheet;

D) holding the frozen bar in the opening of the sheet at ambient temperature until the metal bar is adjusted whilst tightening; and

then

E) cutting the metal bar along straight section in a plane of a surface of the PAEK sheet, once the metal bar has expanded and adjusted whilst tightening in the opening of the sheet, to obtain the metal stud.

5. The method of claim 4, wherein the hole in A) is formed in a single sheet having a thickness such that it is rigid.

6. The method of claim 5, comprising:

C′

) during C), introducing the frozen bar into the opening of the rigid sheet until a connection is made with a portion of a current collector positioned on a side of the rigid sheet opposite the side that the bar was introduced;

D′

) during D), holding the connection of the metal bar with the current collector;

E′

) during E), cutting the metal bar only on the side of the rigid sheet through which the bar was introduced, wherein the stud incorporated in the rigid sheet is also permanently connected with the portion of the current collector.