METHOD AND APPARATUS FOR MANAGING BATTERY

• US 20150349547A1
• Filed: 12/15/2014
• Published: 12/03/2015
• Est. Priority Date: 05/30/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JEON, Jinyong
• Granted Patent: US 9,660,462 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 3/0084 relating to control modules
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• 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: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A battery managing apparatus includes a battery controller configured to determine a time when a battery enters a steady state based on a charge and discharge current of the battery that is measured in response to a switching of a charge and discharge circuit connected to the battery. The apparatus further includes a time controller configured to wake up the battery controller based on the time when the battery enters the steady state, the battery controller being controlled based on the switching of the charge and discharge circuit. The battery controller is configured to control the battery in response to the time controller waking up the battery controller.

Claims

1. A battery managing apparatus, comprising:

a battery controller configured to determine a time when a battery enters a steady state based on a charge and discharge current of the battery that is measured in response to a switching of a charge and discharge circuit connected to the battery; and

a time controller configured to wake up the battery controller based on the time when the battery enters the steady state, the battery controller being controlled based on the switching of the charge and discharge circuit,

wherein the battery controller is further configured to control the battery in response to the time controller waking up the battery controller.

2. The apparatus of claim 1, wherein the battery controller is further configured to:

measure the charge and discharge current of the battery at a time when a switch of the charge and discharge circuit is turned off or immediately prior to the switch being turned off.

3. The apparatus of claim 1, wherein the battery controller is configured to:

determine the time when the battery enters the steady state by comparing the charge and discharge current to predetermined reference information.

4. The apparatus of claim 1, further comprising:

a driving power supplier configured to supply driving power to the battery controller,

wherein the time controller is configured to wake up the battery controller by transmitting a wakeup signal to the driving power supplier.

5. The apparatus of claim 4, wherein the driving power supplier is configured to:

supply the driving power to the battery controller in response to receiving the wakeup signal.

6. The apparatus of claim 1, wherein:

the battery controller is further configured to set a wakeup cycle based on the time when the battery enters the steady state; and

the time controller is configured to wake up the battery controller based on the wakeup cycle.

7. The apparatus of claim 1, further comprising:

a balancing unit configured to measure voltages of cells comprised in the battery, and perform balancing on the cells in response to the battery controller controlling the battery.

8. The apparatus of claim 7, wherein the battery controller is further configured to:

calculate a voltage deviation between the cells based on the voltages; and

control the balancing unit to perform the balancing on the cells in response to the voltage deviation being greater than a predetermined voltage.

9. The apparatus of claim 7, wherein:

the balancing unit comprises resistors connected respectively to the cells; and

the battery controller is further configured to control the balancing unit to apply power of remaining cells, excluding a cell having a lowest voltage among the cells, to resistors connected respectively to the remaining cells to allow respective voltages of the remaining cells to be a voltage of the cell having the lowest voltage.

10. The apparatus of claim 7, wherein:

the balancing unit comprises a temperature measurer configured to measure a temperature of the resistors; and

the battery controller is further configured to control the balancing unit to perform the balancing on the cells in response to the measured temperature being less than a predetermined temperature.

11. The apparatus of claim 1, wherein the battery controller is further configured to:

detect a state of charge of the battery in response to the time controller waking up the battery controller.

12. The apparatus of claim 11, further comprising:

a voltage measurer configured to measure an open circuit voltage of the battery,

wherein the battery controller is configured to detect the state of charge of the battery based on the measured open circuit voltage.

13. The apparatus of claim 1, wherein the battery controller is further configured to:

detect a state of health of the battery in response to the time controller waking up the battery controller.

14. The apparatus of claim 13, further comprising:

a resistance measurer configured to measure an internal resistance of the battery,

wherein the battery controller is configured to detect the state of health of the battery based on the measured internal resistance.

15. The apparatus of claim 1, wherein the battery controller is further configured to:

store information of the control of the battery.

16. An operating method of a battery managing apparatus, the method comprising:

determining a time when a battery enters a steady state based on a charge and discharge current of the battery that is measured in response to a switching of a charge and discharge circuit connected to the battery;

setting a period of time during which the battery managing apparatus is woken up based on the time when the battery enters the steady state, the battery managing apparatus being controlled based on the switching of the charge and discharge circuit; and

controlling the battery in response to the battery managing apparatus being woken up.

17. The method of claim 16, further comprising:

measuring the charge and discharge current of the battery at a time when a switch of the charge and discharge circuit is turned off or immediately prior to the switch being turned off.

18. The method of claim 16, wherein the controlling comprises:

measuring voltages of cells comprised in the battery; and

performing balancing on the cells based on the measured voltages.

19. The method of claim 16, wherein the controlling comprises:

measuring an open circuit voltage of the battery; and

detecting a state of charge of the battery based on the measured open circuit voltage.

20. The method of claim 16, wherein the controlling comprises:

measuring an internal resistance of the battery; and

detecting a state of health of the battery based on the measured internal resistance.