Battery with a battery module and method for its operation

Patent metadata

Field	Value
Publication number	US-12087970-B2
Application number	US-202017097403-A
Country	US
Kind code	B2
Filing date	Nov 13, 2020
Priority date	Nov 14, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A battery cell having first cell connectors, a galvanic cell and a first switching unit electrically coupled to the first cell connectors and the galvanic cell for electrically coupling the galvanic cell to the first cell connectors depending on a switching state of the first switching unit. The battery cell has second cell connectors electrically separated from the first cell connectors and a second switching unit electrically coupled to the second cell connectors and the galvanic cell for electrically coupling the galvanic cell to the second cell connectors depending on a switching state of the second switching unit.

First claim

The invention claimed is:

1. A battery cell comprising:
four first cell connectors configured as main terminals;
a galvanic cell; and
a first switching unit electrically coupled to the first cell connectors, wherein the galvanic cell is configured to be electrically coupled to the first cell connectors depending on a switching state of the first switching unit;
two second cell connectors configured as secondary terminals that are electrically isolated from the four first cell connectors, wherein the second cell connectors are connected to two center taps of the first switching unit; and
a second switching unit that is configured to be electrically coupled to the second cell connectors to electrically couple the galvanic cell to the second cell connectors depending on a switching state of the second switching unit.

2. The battery cell of claim 1 , wherein the first switching unit and/or the second switching unit comprise at least one bridging switching element.

3. The battery cell according to claim 1 , wherein the first switching unit is configured to electrically couple at least two of the first cell connectors to each other depending on one of several switching states of the first switching unit, and/or the second switching unit is configured to electrically couple at least two of the second cell connectors to each other.

4. The battery cell according to claim 1 , wherein the first switching unit further comprises:
a first switching element configured to electrically couple the second main terminal and the third main terminal,
a second switching element configured to electrically couple the first main terminal and the fourth main terminal,
a third switching element configured to electrically couple the first main terminal and the second main terminal, and
a fourth switching element connected in series with the galvanic cell, wherein the first series circuit is connected between the second main terminal and the fourth main terminal such that a first potential terminal of the galvanic cell is connected to the fourth main terminal, and the second switching unit comprises a series circuit of three switching elements, the second switching element of the series circuit being directly connected to both potential terminals of the galvanic cell.

5. The battery cell according to claim 1 , further comprising:
a cell housing in which at least the first switching element and the second switching element are arranged which has at least one terminal contact for each of the cell connectors and each of the terminal contacts is configured to be electrically isolated from other terminal contacts.

6. The battery module comprising a first battery cell and a second battery cell formed according to the battery cell of claim 1 , wherein pairs of first cell connectors of the first battery cell are electrically connected to pairs the first cell connectors of the second battery cell.

7. The battery module according to claim 6 , wherein a second cell connector of the first battery cell is configured to be electrically connected to a second cell connector of the second battery cell.

8. The battery module according to claim 6 , wherein the battery module is configured to be connected to at least six connection poles.

9. A motor vehicle with an on-board supply system comprising an electric machine as a drive device with the battery of claim 8 and the electric machine is directly connected to the battery.

10. The battery cell of claim 1 , wherein the first switching unit and/or the second switching unit further comprise:
at least one bridging switching element.

11. The battery cell according to claim 1 , wherein the first switching unit further comprises:
a first switching element configured to electrically couple the second main terminal and the third main terminal,
a second switching element configured to electrically couple the first main terminal and the fourth main terminal,
a third switching element configured to electrically couple the first main terminal and the second main terminal, and
a fourth switching element connected in series with the galvanic cell, wherein the first series circuit is connected between the second main terminal and the fourth main terminal such that a first potential terminal of the galvanic cell is configured to be connected to the fourth main terminal, and the second switching unit comprises a series circuit of three switching elements, the second switching element of the series circuit being directly connected to both potential terminals of the galvanic cell.

12. The battery cell according to claim 2 , wherein the first switching unit further comprises:
a first switching element configured to electrically couple the second main terminal and the third main terminal,
a second switching element configured to electrically couple the first main terminal and the fourth main terminal,
a third switching element configured to electrically couple the first main terminal and the second main terminal, and
a fourth switching element connected in series with the galvanic cell, wherein the first series circuit is connected between the second main terminal and the fourth main terminal such that a first potential terminal of the galvanic cell is configured to be connected to the fourth main terminal, and the second switching unit comprises a series circuit of three switching elements, the second switching element of the series circuit being directly connected to both potential terminals of the galvanic cell.

13. The battery cell according to claim 3 , wherein the first switching unit further comprises:
a first switching element configured to electrically couple the second main terminal and the third main terminal,
a second switching element configured to electrically couple the first main terminal and the fourth main terminal,
a third switching element configured to electrically couple the first main terminal and the second main terminal, and
a fourth switching element connected in series with the galvanic cell, wherein the first series circuit is connected between the second main terminal and the fourth main terminal such that a first potential terminal of the galvanic cell is configured to be connected to the fourth main terminal, and the second switching unit comprises a series circuit of three switching elements, the second switching element of the series circuit being directly connected to both potential terminals of the galvanic cell.

14. The battery cell according to claim 1 , further comprising:
a cell housing in which the first switching element and the second switching element are arranged which has at least one terminal contact for each of the cell connectors and each of the terminal contacts is configured to be electrically isolated from other terminal contacts.

15. The battery cell according to claim 2 , further comprising:
a cell housing in which the first switching element and the second switching element are arranged which has at least one terminal contact for each of the cell connectors and each of the terminal contacts is configured to be electrically isolated from other terminal contacts.

Assignees

• Audi Ag

Inventors

• Hinterberger Michael
• Terbrack Christoph
• Endisch Christian
• Stöttner Julia

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/56

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title

• H02J7/663

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H01M50/543

  Terminals · CPC title