Battery management converter system

Patent metadata

Field	Value
Publication number	US-10074995-B2
Application number	US-201414318047-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	Jun 28, 2013
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

Aspects of a battery management converter system are described. In one embodiment, a battery management converter system includes an arrangement of a plurality of battery converter cells, where each battery converter cell includes one or more battery cells and a switching power converter. The system further includes a battery converter cell controller for each of the plurality of battery converter cells, and a battery management converter controller that receives battery status information from each battery converter cell controller and provides control references to distribute charging or discharging power among the plurality of battery converter cells.

First claim

At least the following is claimed:

1. A battery management converter system, comprising:
an arrangement of a plurality of battery converter cells, each battery converter cell including a switching power converter having an output and an input coupled to one or more battery cells, the outputs of each of the switching power converters being electrically coupled in a series arrangement to provide an alternating current (AC) or direct current (DC) system power output for coupling to a load;
a battery converter cell controller for each of the plurality of battery converter cells, wherein each battery converter cell controller:
receives battery status parameter information from a respective one of the plurality of battery converter cells;
generates at least one gate control trigger signal for the respective one of the plurality of battery converter cells; and
generates a battery status signal based on the battery status parameter information and a charging state of the respective one of the plurality of battery converter cells; and

a battery management converter controller that receives the battery status signal from each battery converter cell controller and provides voltage reference signals to the plurality of battery converter cells to control power charging or discharging distribution and to balance batteries among the plurality of battery converter cells.

2. The system according to claim 1 , wherein the battery status parameter information comprises at least one of battery cell output voltage, battery cell output current, or battery cell temperature information.

3. The system according to claim 1 , wherein the switching power converter of each of the plurality of battery converter cells comprises any one of a buck, boost, buckboost, full-bridge, half-bridge, Ćuk, single-ended primary-inductor converter (SEPIC), or Zeta power converter.

4. The system according to claim 1 , wherein the battery management converter controller generates the voltage reference signals to control power charging or discharging distribution among the plurality of battery converter cells based on a comparison of the battery status signal from each battery converter cell controller.

5. The system according to claim 1 , wherein the battery management converter controller generates the voltage reference signals to control power charging or discharging distribution among the plurality of battery converter cells based on a maximum gain of the switching power converters among the plurality of battery converter cells.

6. The system according to claim 1 , wherein the battery management converter controller balances a state of charge of the one or more battery cells in each of the plurality of battery converter cells.

7. A battery management converter control method, comprising:
receiving, by a plurality of battery converter cell controllers, battery status information from a plurality of battery converter cells, each battery converter cell including a switching power converter having an output and an input coupled to one or more battery cells, the outputs of each of the switching power converters being electrically coupled in a series arrangement to provide a system power output for coupling to a load;
estimating, by the plurality of battery converter cell controllers, battery status parameters for the plurality of battery converter cells;
calculating, by the plurality of battery converter cell controllers, battery status signals for the plurality of battery converter cells based on the battery status parameters and a charging state of each of the battery converter cells;
generating, by a battery management controller, voltage reference signals for the plurality of battery converter cell controllers; and
generating, by the plurality of battery converter cell controllers, at least one gate control trigger signal based on the voltage reference signals.

8. The method according to claim 7 , further comprising controlling power charging or discharging distribution and balancing batteries among the plurality of battery converter cells based on the at least one gate control trigger signal.

9. The method according to claim 7 , wherein generating the voltage reference signals comprises, starting from a largest one of the battery status signals to a smallest one of the battery status signals, generating a respective voltage reference signal for each of the plurality of battery converter cell controllers based on a corresponding one of the battery status signals and a sum of the battery status signals.

10. The method according to claim 7 , wherein the battery status parameters comprise state of charge, capacity, and state of health parameters.

11. A battery management converter system, comprising:
an arrangement of a plurality of battery converter cells, each battery converter cell including a switching power converter having an output and an input coupled to one or more battery cells, the outputs of each of the switching power converters being electrically coupled in a series arrangement to provide a system power output for coupling to a load;
at least one battery converter cell controller for the plurality of battery converter cells, wherein the at least one battery converter cell controller:
receives battery status parameter information from at least one of the plurality of battery converter cells;
generates at least one gate control trigger signal for the at least one of the plurality of battery converter cells; and
generates a battery status signal based on the battery status parameter information and a charging state of the at least one of the plurality of battery converter cells; and

a battery management converter controller that receives the battery status signal and generates a voltage reference signal for the at least one of the plurality of battery converter cells.

12. The system according to claim 11 , wherein the battery status parameter information comprises at least one of battery cell output voltage, battery cell output current, or battery cell temperature information.

13. The system according to claim 11 , wherein each of the plurality of battery converter cells comprises at least one of a buck, boost, buckboost, full-bridge, half-bridge, Ćuk, single-ended primary-inductor converter (SEPIC), or Zeta switching power converter.

14. The system according to claim 11 , wherein the battery management converter controller further:
receives a voltage feedback signal from a power grid and a current reference signal from a user through a user interface; and
generates a voltage reference signal for the at least one of the plurality of battery converter cells based at least in part on the voltage feedback signal and the current reference signal.

15. The system according to claim 11 , wherein the battery management converter controller further:
receives a current feedback signal from a load and a voltage reference signal from a user through a user interface; and
generates a voltage reference signal for the at least one of the plurality of battery converter cells based at least in part on the current feedback signal and the voltage reference signal.

16. The system according to claim 11 , wherein the at least one battery converter cell controller generates the battery status signal according to a function of at least one of a state charge, voltage, capacity, or charging or discharging information of a battery cell in the at least one of the plurality of battery converter cells.

17. The system according to claim 11 , wherein the battery management converter controller:
receives at least one voltage or

Assignees

• Smedley Gregory
• Smedley Keyue
• Naderi Roozbeh
• Univ California
• One Cycle Control Inc

Inventors

• Smedley Gregory
• Smedley Keyue
• Naderi Roozbeh

Classifications

• H02J7/60

  including safety or protection arrangements · CPC title

• H02J7/56 Primary

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

• H02J2207/20

  Charging or discharging characterised by the power electronics converter · CPC title

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title

• H02M2001/0074

  Electricity · mapped topic