SYSTEM AND METHOD FOR BATTERY MANAGEMENT

• US 20160241058A1
• Filed: 02/18/2015
• Published: 08/18/2016
• Est. Priority Date: 02/18/2015
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Carralero, Michael A., Quiambao, Jimmy M.
• Granted Patent: US 10,547,184 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage

Abstract

A system includes a battery and a power management unit connected with the battery. The power management unit controls power to the battery. A spare power unit can connect with the power management unit and the battery. The power management unit stores excess charge to the spare power unit and to divert stored charge to the battery when the battery is charged less than a determined percentage.

Claims

1. A system, comprising:

a battery;

a power management unit connected with a battery, the power management unit controls power to the battery; and

a spare power unit connected with the power management unit and the battery, the power management unit stores excess charge to the spare power unit and to divert stored charge to the battery when the battery is charged less than a determined percentage.

2. The system of claim 1, where the power management unit is operates the battery within determined threshold limits.

3. The system of claim 2, where the threshold limits comprise at least one of power and current for a determined load.

4. The system of claim 1, where the power management unit is determines a health of the battery.

5. The system of claim 4, where the health of the battery comprises a new battery, a battery half way through life and a battery at an end of life.

6. The system of claim 4, where the power management unit is adjusts thresholds limits based on the health of the battery.

7. The system of claim 1, where the power management unit is predicts a state of the battery by comparing real-time data with simulated data.

8. The system of claim 1, further comprising an isolation transformer connected between the battery and spare power unit.

9. The system of claim 1, further comprising a zener diode connected with a cell of the battery, the zener diode bypasses a bad cell.

10. The system of claim 9, where the bad cell comprises an open-circuit to the battery during charging or discharging.

11. The system of claim 1, where the power management unit is predicts a life of the battery.

12. The system of claim 1, where the power management unit is recommends a maintenance for the battery.

13. The system of claim 1, further comprising a temperature management unit connected with the power management unit, the temperature management unit monitors a temperature of the battery and to stop charging or discharging the battery when the battery is operating outside of a determined limit.

14. The system of claim 1, further comprising a gas management unit connected with the power management unit, the gas management unit monitors a pressure of gas around the battery and to open a valve to relieve pressure and divert gas when the gas or pressure are outside of a determined limit.

15. The system of claim 1, further comprising a cell balancing unit connected with the battery and the spare power unit, the cell balancing unit balances a charge of cells of the battery.

16. A method, comprising:

monitoring with a processor a voltage, a current and a temperature of a battery;

determining a state of health of the battery based on real time operation of the battery and a virtual operation of the battery; and

setting an operating limit of the battery based on the state of health of the battery.

17. The method of claim 16, further comprising sending excess charge to a spare power unit and diverting stored charge from the spare power unit to the battery that is charged less than a determined percentage.

18. The method of claim 16, further comprising predicting a life of the battery.

19. The method of claim 16, further comprising recommending a maintenance of the battery.

20. The method of claim 16, further comprising balancing a charge of cells of the battery.