Series connection of on-off controllers for power transmission in battery systems

• US 8,810,070 B2
• Filed: 01/14/2010
• Issued: 08/19/2014
• Est. Priority Date: 01/20/2009
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Butzmann, Stefan
• Primary Examiner(s): Deberadinis, Robert L.
• Application Number:
  US13/145,443
• Publication Number:
  US 20110273024A1
• Time in Patent Office: 1,678 Days
• Field of Search: 307/83
• US Class Current: 307/83
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02M 1/0077 Plural converter units whose outputs are connected in series

Abstract

A power transmitter for a battery system, a battery system including such a power transmitter, and a motor vehicle including such a battery system are disclosed. The power transmitter includes a plurality of DC/DC converters, each of which has a first and a second input and a first and a second output. According to the invention, first and second inputs are designed to connect a battery module, while the DC/DC converters are connected in series at the output end.

Claims

1. An energy transmitter for a battery system, the energy transmitter including a plurality of DC/DC converters, each having one first input and one second input and one first and output and one second output, wherein the first input and the second input are embodied for connection of a battery module, each of the DC/DC converters having a first control input for a first control signal to produce an electrical connection the first output of the DC/DC converter to the second output of the DC/DC converter upon reception of the first control signal, and wherein the DC/DC converters are connected in series on an output side.

2. The energy transmitter of claim 1, wherein the DC/DC converters each have a first coil.

3. The energy transmitter of claim 2, wherein the DC/DC converters have a second coil, which is coupled with the first coil of the DC/DC converter to form a power transmitter or storage transformer.

4. The energy transmitter of claim 2, wherein the DC/DC converters are embodied as flyback converters, forward converters, push-pull converters, half-bridge converters, and full-bridge converters, or as resonance converters.

5. The energy transmitter of claim 4, wherein each first input of the DC/DC converters is connected to a ground.

6. The energy transmitter of claim 2, wherein each first input of the DC/DC converters is connected to a ground.

7. The energy transmitter of claim 3, wherein the DC/DC converters are embodied as flyback converters, forward converters, push-pull converters, half-bridge converters, and full-bridge converters, or as resonance converters.

8. The energy transmitter of claim 3, wherein each first input of the DC/DC converters is connected to a ground.

9. The energy transmitter of claim 7, wherein each first input of the DC/DC converters is connected to a ground.

10. The energy transmitter of claim 9, wherein each of the DC/DC converters has a freewheel diode, and which anode of each freewheel diode is connected to the second input of the DC/DC converter, and which cathode of each freewheel diode is connected to the first output of the DC/DC converter.

11. The energy transmitter of claim 10, wherein each of the DC/DC converters has a second control input for a second control signal and is embodied for increasing a voltage between the first output and the second output of the DC/DC converter upon reception of the second control signal.

12. The energy transmitter of claim 1, wherein each first input of the DC/DC converters is connected to a ground.

13. The energy transmitter of claim 1, wherein each of the DC/DC converters has a freewheel diode, and which anode of each freewheel diode is connected to the second input of the DC/DC converter, and which cathode of each freewheel diode is connected to the first output of the DC/DC converter.

14. The energy transmitter of claim 13, wherein each of the DC/DC converters has a second control input for a second control signal and is embodied for increasing a voltage between the first output and the second output of the DC/DC converter upon reception of the second control signal.

15. A battery system having an energy transmitter as defined by claim 1 and having a plurality of battery modules, which each have at least one battery cell and whose battery poles are disconnectably attached to a corresponding input of the first input and the second input of a DC/DC converter of the energy transmitter.

16. The battery system of claim 15, wherein the energy transmitter is operatively connected to the plurality of battery modules and an electric motor to provide electric power to operate the electric motor.