Electrochemical pouch cell for energy storage device
An electrochemical pouch cell is for an electrical energy storage device, in particular intended for a motor vehicle. The electrochemical cell includes a stack of a plurality of electrodes, at least one electric terminal and a liner connected to the electric terminal and to itself, respectively at a primary connection and a secondary connection, so as to form a recess into which the plurality of electrodes and all or part of the at least one electric terminal extend, the electric terminal having a first dimension substantially equal to or greater than a first dimension of a stack of the plurality of electrodes.
1 . An electrochemical pouch cell for an electrical energy storage device, the electrochemical cell comprising:
a stack of a plurality of electrodes;
a liner;
at least one electrical terminal comprising a base produced in an insulating material and an electrical connector extending along a first axis, the base of the electrical terminal having a first dimension on a second axis substantially equal to or greater than a first dimension on the second axis of the stack of the plurality of electrodes, said second axis being orthogonal to said first axis, the at least one electrical terminal and the liner contributing to delimiting a housing in which the plurality of electrodes extends;
at least one primary link of an end portion of the liner to a perimeter of the base of the at least one electrical terminal;
a secondary link of an end lateral portion of the liner to an opposite end lateral portion of the liner, that is distinct from the end portion and at least one spacing member disposed in the housing, and interposed between the plurality of electrodes and the at least one electrical terminal, the spacing member comprising at least one void configured to receive at least one tongue of at least one electrode, wherein the spacing member has a cellular structure, the cellular structure comprising cells, in a vacuum, configured to accommodate a gas produced during the operation of the electrochemical cell.
2 . The electrochemical cell as claimed in claim 1 , wherein the electrical energy storage device is an electrical battery.
3 . The electrochemical cell as claimed in claim 1 , wherein the plurality of electrodes includes at least one anode and one cathode.
4 . The electrochemical cell as claimed in claim 1 , wherein the base of the at least one electrical terminal has a second dimension on a third axis substantially equal to or greater than a second dimension on the third axis of the stack of the plurality of electrodes, said third axis being orthogonal to the first axis and to the second axis.
5 . The electrochemical cell as claimed in claim 1 , wherein the at least one primary link is produced by thermowelding or by bonding and/or wherein the secondary link is produced by thermowelding or by bonding.
6 . The electrochemical cell as claimed in claim 1 , wherein the electrical connector of the at least one terminal extends through the base, the electrical connector comprising an outer portion that is flat or substantially flat and/or extending parallel or substantially parallel to an outer face of the base.
7 . The electrochemical cell as claimed in claim 1 , wherein the cellular structure is a honeycomb structure.
8 . The electrochemical cell as claimed in claim 1 , wherein the base of the at least one electrical terminal comprises:
a fixing member configured to ensure an anchoring of the electrochemical cell onto a support element;
a sensor; or
an overcharge safety device.
9 . The electrochemical cell as claimed in claim 8 , wherein the sensor is a temperature or pressure sensor.
10 . The electrochemical cell as claimed in claim 1 , wherein the base of the at least one electrical terminal comprises:
a fixing member configured to ensure an anchoring of the electrochemical cell onto a support element;
a sensor; and
an overcharge safety device.
11 . An electrical energy storage device, comprising:
at least one of the electrochemical cell as claimed in claim 1 .
12 . The storage device as claimed claim 11 , wherein the storage device is for a motor vehicle.
13 . The storage device as claimed claim 11 , further comprising a cooling means arranged along a lateral side of the at least one electrochemical cell.
14 . A hybrid or electric motor vehicle comprising:
at least one of the electrochemical cell as claimed in claim 1 .
15 . A method for manufacturing the electrochemical cell as claimed in claim 1 , comprising:
stacking a plurality of electrodes;
connecting at least one electrical terminal to the plurality of electrodes; positioning at least one spacing member between the plurality of electrodes and the at least one electrical terminal, the spacing member comprising at least one void configured to receive at least one tongue of at least one electrode, wherein the spacing member has a cellular structure, the cellular structure comprising cells, in a vacuum, configured to accommodate a gas produced during the operation of the electrochemical cell;
jacketing a set of the plurality of electrodes and at least a part of the base of the at least one electrical terminal in a non-predeformed liner;
linking the liner to the base of the at least one electrical terminal at a primary link; and
linking the liner to itself at a secondary link.
16 . The manufacturing method as claimed in claim 15 , wherein the jacketing comprises aligning at least one of the end portions of the liner with the perimeter of the base of the at least one electrical terminal.