Method for manufacturing a unit for storing electrical energy

Patent metadata

Field	Value
Publication number	US-9502184-B2
Application number	US-201314377166-A
Country	US
Kind code	B2
Filing date	Feb 7, 2013
Priority date	Feb 7, 2012
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

The invention relates to a method for manufacturing a unit for storing electrical energy, comprising a cover and an outer casing, the method including a closing step ( 400 ) consisting of contactlessly applying a compressive force to one of the parts forming the storage unit, such that the cover and the outer casing are mechanically titled into one another so as to close the outer casing using the cover by means of the engagement of the shapes thereof.

First claim

The invention claimed is:

1. A method for manufacturing an electrical energy-storage unit comprising at least:
an external envelope comprising a coupling zone, the external envelope being open at at least one of its ends,
at least one cover comprising a coupling zone, the cover being intended to be positioned at the level of the open end of the external envelope such that the coupling zones are opposite each other,
at least one of the coupling zones including at least one relief portion,
wherein the method comprises a closing step consisting of applying a contactless compression force to at least one of the pieces of the storage unit such that the cover and the external envelope come into contact with each other at the level of the portion or portions in relief to close the open end of the external envelope with the cover by cooperation of form.

2. The method according to claim 1 , wherein the closing step consists of applying a contactless magneto-mechanical force to at least one of the pieces constituting the storage unit such that the cover and the external envelope come into contact with each other at the level of the relief portion to close the open end of the envelope with the cover by cooperation of form, said piece being made at least partially of electrically conductive material.

3. The method according to claim 2 , wherein the magneto-mechanical force is applied by means of a device for generation of a magnetic pulse, the method comprising a positioning step of the envelope and of the cover such that they are enclosed at least partially by the generation device, especially an inductor of the device, the pulse being preferably generated at an energy of between 5 and 20 kJ.

4. The method according to claim 1 , which comprises, prior to the closing step, a positioning step of the cover and of the envelope, the cover and the envelope being positioned in the generation device, such that the contactless compression force is applied only to the cover and the envelope at the level of the coupling zones ( 23 , 46 ).

5. The method according to claim 1 , wherein, prior to the closing step, a first element, especially the external envelope, is positioned around the other element, especially the cover, such that the coupling zone of the first element encloses the coupling zone of the other element, the relief portion being arranged in the coupling zone of the other element.

6. The method according to claim 1 , wherein the portion or portions in relief are configured such that the element has at least two shoulders oriented in opposite directions and is positioned in the inductor such that the compression force is in a direction essentially perpendicular to the normal of the shoulders.

7. The method according to claim 6 , wherein a plurality of portions in relief is arranged in the cover, the cover comprising at least one lateral wall and two end walls, the portions in relief comprising at least one first cavity opening on the or at least one of the lateral walls and an end wall and at least one second cavity, opening on the or at least one of the lateral walls and the other end wall.

8. The method according to claim 7 , wherein the or the first cavities open on a first part or first parts of the or at least one of the lateral walls and the second cavity or second cavities open on a second part or second parts of the or at least one of the lateral walls, the first and second parts of the or at least one of the lateral walls being separate.

9. The method according to claim 1 , wherein at least one relief portion comprises:
a bead peripheral, and/or
a plurality of teeth, and/or
a groove, having preferably a depth greater than 1 mm, especially 3 mm.

10. The method according to claim 1 , which comprises, prior to the closing step, a step consisting of positioning a joint between the coupling zones of the cover and the external envelope.

11. The method according to claim 1 , which comprises, prior to the closing step, a step consisting of positioning an electrically conductive ring around the coupling zones, the closing step consisting of applying a contactless magneto-mechanical force to the ring such that the cover and the external envelope fit mechanically into each other at the level of the relief portion to close the open end of the envelope with the cover by cooperation of form.

12. The method according to claim 1 , which comprises, prior to the closing step, a step consisting of depositing a layer of electrically conductive material to the external peripheral face of at least one of the elements of the external envelope and the cover, said layer being deposited at least on a coupling zone of this piece.

13. The method according to claim 1 , which comprises, prior to the closing step, an impregnation step of a capacitive element intended to be housed in the external envelope.

14. The method according to claim 1 , wherein the storage unit comprises an internal core extending longitudinally inside the capacitive element and passing through the unit from side to side, the method also comprising, during the closing step, an application step of a contactless compression force to at least one piece of the unit such that the cover and/or the envelope is deformed to come into contact with the internal core to close the energy-storage unit at the level of the core.

Assignees

• Blue Solutions

Inventors

• Vigneras Erwan

Classifications

• H01M50/167

  by crimping · CPC title

• H01G2/106

  Fixing the capacitor in a housing · CPC title

• H01G2/103

  Sealings, e.g. for lead-in wires; Covers · CPC title

• H01G9/10 Primary

  Sealing, e.g. of lead-in wires · CPC title

• H01G11/84

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title