Storage module for an energy store of a motor vehicle, and energy store

Patent metadata

Field	Value
Publication number	US-12090865-B2
Application number	US-201917053316-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jun 28, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

The storage module for an energy store of a motor vehicle includes multiple storage cells. The multiple storage cells are wired together according to a circuit topology and are electrically connected together for storing electric energy. Each storage cell has at least one electric heating element for heating the each storage cell. The heating elements are electrically connected to one another according to the same circuit topology.

First claim

What is claimed is:

1. A storage module for an energy store of a motor vehicle, comprising:
a plurality of storage cells for storing electrical energy and being interconnected with one another and electrically connected to one another in accordance with a circuit topology;
a plurality of electrical heating elements;
wherein each respective storage cell of the plurality of storage cells is assigned at least one electrical heating element of the plurality of electrical heating elements for heating the respective storage cell;
wherein the electrical heating elements of the plurality of electrical heating elements are interconnected with one another and are electrically connected to one another in accordance with the same circuit topology;
wherein the storage module has two switching elements that are together configured to:
electrically connect the plurality of electrical heating elements to the plurality of storage cells to activate the plurality of electrical heating elements; and
electrically disconnect the plurality of electrical heating elements from the plurality of storage cells to deactivate the plurality of electrical heating elements; and

wherein:
a first switching element of the two switching elements is electrically connected in series with the plurality of electrical heating elements and with a positive pole of a first storage cell of the plurality of storage cells; and
a second switching element of the two switching elements is electrically connected in series with the plurality of electrical heating elements and with a negative pole of a second storage cell of the plurality of storage cells.

2. The storage module according to claim 1 , wherein each of the two switching elements comprises two switches.

3. The storage module according to claim 2 , wherein for each switching element, the two switches of the switching element are connected in series.

4. The storage module according to claim 2 , wherein for each switching element, the two switches of the switching element are assigned exactly one optocoupler to effect a switchover of an assigned switch.

5. The storage module according to claim 3 , wherein for each switching element, the two switches of the switching element are assigned exactly one optocoupler to effect a switchover of an assigned switch.

6. The storage module according to claim 1 , wherein:
each respective electrical heating element of the plurality of electrical heating elements has two terminals; and
the electrical heating elements of the plurality of heating elements are interconnected with one another via the terminals.

7. The storage module according to claim 6 , wherein:
one of the terminals of each respective electrical heating element is electrically connected to a respective cell housing of the storage cell assigned to the respective electrical heating element; and
the electrical heating elements of the plurality of heating elements are electrically interconnected with one another with a mediation of the cell housings of the storage cells.

8. The storage module according to claim 7 , wherein for a cell housing of the cell housings of the storage cells, an electrolyte is accommodated in the cell housing and is electrically insulated from the cell housing.

9. The storage module according to claim 1 , wherein
the storage cells are arranged successively along a stacking direction, wherein
at least one electrical heating element is arranged on two sides of the respective storage cell that face away from one another along the stacking direction.

10. An energy store for a motor vehicle, comprising:
at least one storage module according to claim 1 .

11. A storage module for an energy store of a motor vehicle, comprising:
a plurality of cell groups, each comprising:
a plurality of storage cells for storing electrical energy and being interconnected in parallel with one another and electrically connected to one another; and
a plurality of electrical heating elements;

wherein:
each respective storage cell of the respective cell group is assigned at least one electrical heating element of the plurality of electrical heating elements for heating the respective storage cell; and
exactly one switching element is provided per cell group, the switching element electrically connected in series with the plurality of heating elements and configured to:
electrically connect the plurality of electrical heating elements of the respective cell group to the plurality of storage cells of the storage module to activate the plurality of electrical heating elements; and
electrically disconnect the plurality of electrical heating elements from the plurality of storage cells of the storage module to deactivate the plurality of electrical heating elements.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Bauer Christoph
• Hammerschmidt Thomas
• Nuernberger Simon
• Schmidt Jan Philipp

Classifications

• H02J7/65

  against overtemperature · CPC title

• H01M50/51

  Connection only in series · CPC title

• H01M10/658

  by thermal insulation or shielding · CPC title

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title