CIRCUIT ASSEMBLY

• US 20130015818A1
• Filed: 01/19/2011
• Published: 01/17/2013
• Est. Priority Date: 02/15/2010
• Status: Abandoned Application

• Current Assignee: Li-Tec Battery GmbH (Mercedes-Benz Group AG)
• Original Assignee: Li-Tec Battery GmbH (Mercedes-Benz Group AG)
• Inventors: Schaefer, Tim
• Application Number:
  US13/578,263
• Publication Number:
  US 20130015818A1
• Time in Patent Office: Days
• US Class Current: 320/119
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The invention relates to a circuit assembly (10), comprising a series connection of first and second battery units (11, 12), wherein first and second battery units (11, 12) are arranged alternately, a first inductive storage element (13), wherein in a primary phase first inputs (17) of the first battery units (11) can be connected to a first terminal (19) of the first inductive storage element (13) by means of a first switch assembly (16) and second inputs of the second battery units (18) can be connected to a second terminal (20) of the first inductive storage element (13) by means of the first switch assembly (15), a second inductive storage element (14) which is inductively coupled to the first inductive storage element (13), wherein in a secondary phase by means of a second switch assembly (16) a first terminal of the second inductive storage element (14) can be connected to a first or a second input and a second terminal of the second inductive storage element (14) can be connected to a second or a first input.

Claims

1. A circuit arrangement comprising:

a series connection of first and second battery units, wherein first and second battery units are arranged in an alternating manner;

a first inductive storage element; and

,

a second inductive storage element, which is inductively coupled to the first inductive storage element,

wherein in a primary phase, first inputs of the first battery units are connected to a first connector of the first inductive storage element via a first switch arrangement and second inputs of the second battery units are connected to a second connector of the first inductive storage element via the first switch arrangement, and

wherein in a secondary phase, using a second switch arrangement

a first connector of the second inductive storage element is connected to a first input of a first battery unit and a second connector of the second inductive storage element is connected to a second input of a second battery unit.

2. The circuit arrangement according to according to claim 1, wherein the inputs of the second battery units are connected to an output of a first battery unit, respectively.

3. The circuit arrangement according to claim 1, wherein first inputs are connected using first intermediate switches and second inputs are connected using second intermediate switches to the first inductive storage element.

4. The circuit arrangement according to claim 1, wherein the second switch arrangement comprises third intermediate switches and fourth intermediate switches.

5. The circuit arrangement according to claim 1, wherein the second switch arrangement comprises fifth and sixth intermediate switches, and third and fifth or fourth and sixth intermediate switches are switched synchronously with one another, respectively.

6. The circuit arrangement according to claim 1, wherein a charging switch is connected in series upstream of the first inductive storage element.

7. The circuit arrangement according to claim 1, wherein a winding ratio (N₁/N₂) of windings (N₁) of the first inductive storage element to windings (N₂) of the second inductive storage element is greater than or equal to 1.

8. The circuit arrangement according to claim 1, wherein the first and second inputs are connected to at least one voltage measuring device.

9. The circuit arrangement according to claim 1, wherein the first inductive storage device and/or the second inductive storage device is connected to a voltage measuring device.

10. A battery management system comprising a circuit arrangement including:

a series connection of first and second battery units, wherein first and second battery units are arranged in an alternating manner;

a first inductive storage element; and

a second inductive storage element, which is inductively coupled to the first inductive storage element,

wherein in a primary phase, first inputs of the first battery units are connected to a first connector of the first inductive storage element via a first switch arrangement and second inputs of the second battery units are connected to a second connector of the first inductive storage element via the first switch arrangement, and

wherein in a secondary phase, using a second switch arrangement

a first connector of the second inductive storage element is connected to a first input of a first battery unit and a second connector of the second inductive storage element is connected to a second input of a second battery unit, or

a first connector of the second inductive storage element is connected to a second input of a second battery unit and a second connector of the second inductive unit is connected to a first input of a first battery unit according to one of the preceding claims.

11. The circuit arrangement according to claim 7, wherein the winding ratio (N₁/N₂) is between 1.05 and 1.5.

12. The circuit arrangement according to claim 11, wherein the winding ratio (N₁/N₂) is between 1.05 and 1.1.