POWER CONSUMPTION REDUCTION METHOD FOR A STORED BATTERY

• US 20140167700A1
• Filed: 02/05/2013
• Published: 06/19/2014
• Est. Priority Date: 12/18/2012
• Status: Active Grant

• Current Assignee: Simplo Technology Incorporated (Simplo Technology STCS Limited)
• Original Assignee: Simplo Technology Incorporated (Simplo Technology STCS Limited)
• Inventors: Chen, Ming-Ta, Chen, Tai-Hung, Huang, Kuo-Chang
• Granted Patent: US 9,112,372 B2
• Time in Patent Office: Days
• US Class Current: 320/134
• CPC Class Codes: H02H 7/18 for batteries; for accumulators
• CPC Class Codes: H02J 7/00306 Overdischarge protection
• CPC Class Codes: H02J 7/0032 disconnection of loads if battery is not under charge, e.g. in vehicle if engine is not running
• CPC Class Codes: H02J 9/005 using a power saving mode for copiers G03G15/5004
• CPC Class Codes: H02J 9/007 Detection of the absence of a load
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

A power consumption reduction method controls a rechargeable battery to enter a sleep mode after the electronic system is shutdown with the output current of the rechargeable battery falling under a first current value or the rechargeable battery is in a non-communication status for over a first delay time. When in the sleep mode, a control unit further controls the rechargeable battery to enter a power saving mode when the output voltage of the rechargeable battery falls under a predefined voltage or the RSOC of the rechargeable battery is lower than a percentage of FCC, and the output current of the rechargeable battery falls under a second current value or the rechargeable battery is in the non-communication status for over a second delay time. The method shuts down all power-consuming circuits and components under long-time idling of the battery, capable of preventing overly discharging and malfunction of the rechargeable battery.

Claims

1. A power consumption reduction method for a stored battery, wherein a rechargeable battery is installed in an electronic system and comprises a control unit, a battery set, and a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) module, the MOSFET module comprising a discharging MOSFET and a charging MOSFET, the method comprising using the control unit to perform the following steps:

when an output current of the battery set is detected by the control unit to be under a first current value for over a first delay time, or when the battery set is detected by the control unit to be in a non-communication status for over the first delay time, the control unit controlling the rechargeable battery to enter a sleep mode; and

when the rechargeable battery is configured in the sleep mode, and either an output voltage of the battery set is detected by the control unit to be under a predefined voltage or a relative state of capacity (RSOC) of the battery set is detected by the control unit to be lower than a critical percentage value, and either the output current is detected by the control unit to be under a second current value for over a second delay time or the battery set is detected by the control unit to be in a non-communication status for over the second delay time, the control unit controlling the rechargeable battery to enter a power saving mode.

2. The method of claim 1, wherein the control unit controlling the rechargeable battery to enter the sleep mode comprises step:

the control unit turning off the charging MOSFET, thereby opening a charging circuit of the rechargeable battery, while the discharging MOSFET remains turned-on and a discharging circuit of the rechargeable battery remains closed.

3. The method of claim 1, wherein the control unit controlling the rechargeable battery to enter the power saving mode comprises step:

the control unit turning off the discharging MOSFET, thereby opening a discharging circuit of the rechargeable battery.

4. The method of claim 3, wherein the control unit controlling the rechargeable battery to enter the power saving mode further comprises step:

the control unit shutting down itself.

5. The method of claim 1, wherein the first current value is 20 mA and the first delay time is 30 seconds.

6. The method of claim 1, wherein the second current value is 10 mA and the second delay time is 48 hours.

7. The method of claim 1, wherein the critical percentage value is 3% and the predefined voltage is 3.3V.

8. The method of claim 1, wherein a wake-up line is further comprised to be connected between the electronic system and the rechargeable battery, the method further comprising step:

when the rechargeable battery is configured in the power saving mode, the electronic system activating the control unit by providing a voltage for the control unit via the wake-up line.

9. The method of claim 1, wherein the second current value is not greater than the first current value.

10. The method of claim 1, wherein when the battery set is in the non-communication status, a clock pin and a data pin of the battery set are both maintained at a low level status or at a high level status.