Method for Producing a Prismatic Battery Cell

Patent metadata

Field	Value
Publication number	US-2017207490-A1
Application number	US-201515329185-A
Country	US
Kind code	A1
Filing date	Jul 13, 2015
Priority date	Jul 25, 2014
Publication date	Jul 20, 2017
Grant date	—

Abstract

A method of producing a prismatic battery cell includes forming an initial arrangement by spatially arranging one or two wiring boards, a cathode layer, an anode layer, and at least two separator layers so as to be in parallel with each other and with respect to a winding axis. The initial arrangement is wound about the winding axis to form a battery winding. The battery winding is inserted in a cell housing, and a respective current connector is connected to each of the cathode layer and anode layer. The cell housing is filled with a liquid electrolyte, and is closed. A prismatic battery cell of this type can be included in a battery, such as a battery included with an automotive vehicle.

First claim

1 . A method of producing a prismatic battery cell comprising:
spatially arranging one or two winding boards, a cathode layer an anode layer, and at least two separator layers parallel to each other and parallel in relation to a winding axis to form an initial arrangement; winding the initial arrangement around the winding axis to form a battery winding; inserting the battery winding into a cell housing; contacting each of the cathode layer and the anode layer to a respective current collector; filling the cell housing with a fluid electrolyte; and closing the cell housing.

2 . The method as claimed in claim 1 , wherein:
forming the initial arrangement includes: spatially arranging the cathode layer, the anode layer and the three separator layers perpendicular to the winding axis and one above another in a sequence of a first separator layer, the anode layer, a second separator layer, the cathode layer, and a third separator layer to form a layer stack; spatially arranging a first winding board above the layer stack and parallel to the winding axis; and spatially arranging a second winding board below the layer stack and parallel to the winding axis; winding the initial arrangement includes winding the layer stack around the first winding board and the second winding board.

3 . The method as claimed in claim 1 , wherein:
forming the initial arrangement includes fastening two separator layers, the cathode layer, and the anode layer to a winding board to form a layer stack; and winding the initial arrangement includes winding the layer stack around the winding board.

4 . The method as claimed in claim 3 , wherein the contacting of the cathode layer and the anode layer to the respective current collectors includes forming a contacting arrangement via the winding board.

5 . The method as claimed in claim 3 , wherein the winding axis lies parallel to a longer side of the winding board relative to a shorter side so that the initial arrangement is wound around the longer side of the winding board.

6 . The method as claimed in claim 3 , wherein the winding axis lies parallel to a shorter side of the winding axis relative to a longer side so that the initial arrangement is wound around the shorter side of the winding board.

7 . The method as claimed in claim 6 , wherein the winding board includes connecting surfaces that lie opposite terminals of the prismatic battery cell.

8 . The method as claimed in claim 1 , wherein inserting the battery winding into the cell housing is performed such that at least one of a filling aperture and a bursting membrane lies in alignment with the winding axis.

9 . A prismatic battery cell, comprising:
a closed cell housing; a battery winding positing in the cell housing, the winding including one or two winding boards, a cathode layer, an anode layer, and at least two separator layers that are parallel to each other and that are wound about a winding axis; a respective current collector connected to each of the cathode layer and the anode layer; and a fluid electrolyte that fills a remainder of the cell housing; wherein the winding board are configured to remain in the cell housing.

10 . A motor vehicle comprising:
a battery that includes at least one prismatic battery cell having:
a closed cell housing;
a battery winding positing in the cell housing, the winding including one or two winding boards, a cathode layer, an anode layer, and at least two separator layers that are parallel to each other and that are wound about a winding axis;
a respective current collector connected to each of the cathode layer and the anode layer; and
a fluid electrolyte that fills a remainder of the cell housing;
wherein the winding board are configured to remain in the cell housing.

Assignees

• Bosch Gmbh Robert

Inventors

• Bacher Antonio
• Hornung Rene
• Seyed Abbassi Seyed Mohammad
• Kaplan Cihan
• Berg Anselm
• Riefler Michael

Classifications

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/0587 Primary

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M50/457

  comprising three or more layers · CPC title