SYSTEM AND METHOD FOR BATTERY SAVER

• US 20120175972A1
• Filed: 12/29/2011
• Published: 07/12/2012
• Est. Priority Date: 12/30/2010
• Status: Abandoned Application

• Current Assignee: Guo Qing Ren
• Original Assignee: Guo Qing Ren
• Inventors: REN, Guo Qing
• Application Number:
  US13/340,328
• Publication Number:
  US 20120175972A1
• Time in Patent Office: Days
• US Class Current: 307/130
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/448 End of discharge regulating measures
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/00306 Overdischarge protection
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 9/002 in which a reserve is maintained in an energy source by disconnecting non-critical loads, e.g. maintaining a reserve of charge in a vehicle battery for starting an engine
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery saver device including a microcontroller that measures a voltage of a battery; a battery control module coupled to the microcontroller and including one or more transistors that electronically connect a device load to the battery when the transistors are in an active mode, and the microcontroller is further provided to turn off the transistors when the voltage of the battery falls below a predetermined threshold voltage.

Claims

1. A battery saver device comprising:

a microcontroller configured to measure a voltage of a battery; and

a battery control module coupled to the microcontroller and having at least one transistor that electronically couples a load to the battery when the at least one transistor is in an active mode,

wherein the microcontroller is configured to turn off the at least one transistor when the voltage is below a threshold voltage.

2. The battery saver device of claim 1, further comprising a load detection module coupled to the microcontroller and configured to detect whether a load is connected to the battery.

3. The battery saver device of claim 2, wherein the load detection module comprises:

a comparator having a positive input and negative input each electrically coupled to the load; and

a capacitor coupled between the negative input and ground, the capacitor charging once the load is connected to the battery,

wherein the comparator outputs a signal based on the voltage difference between the positive input and the negative input.

4. The battery saver device of claim 3, wherein the microcontroller maintains the at least one transistor in active mode for a predetermined time period after receiving the high signal.

5. The battery saver device of claim 1, further comprising a power supply module coupled between the microcontroller and the battery and configured to provide a constant current source to the microcontroller.

6. The battery saver device of claim 5, further comprising a voltage divider coupled between the power supply module and the microcontroller.

7. The battery saver device of claim 1, further comprising a user-operated switch coupled to the microcontroller, wherein the switch causes the microcontroller to turn the at least one transistor off when actuated by a user.

8. The battery saver device of claim 1, wherein the at least one transistor is a MOSFET.

9. The battery saver device of claim 1, wherein the threshold voltage is approximately 11.7 volts.

10. The battery saver device of claim 1, wherein the battery saver device draws less than 10 mA.

11. The battery saver device of claim 1 wherein the at least one transistor is soldered to a first lead and a second lead,

wherein the first lead electrically couples the battery saver device to the battery, and the second lead electrically couples the battery saver device to an electrical load.

12. The battery saver device of claim 2 wherein the at least one transistor is soldered to a first lead and a second lead,

wherein the first lead electrically couples the battery saver device to the battery, and the second lead electrically couples the battery saver device to an electrical load.

13. A battery saver method comprising:

measuring, by a microcontroller, a voltage of a battery; and

forcing off at least one transistor, by the microcontroller, when the measured voltage is below a threshold voltage,

wherein the at least one transistor electronically couples a load to the battery when the at least one transistor is in an active mode.

14. The battery saver method of claim 13, further comprising detecting whether a load is connected to the battery.

15. The battery saver method of claim 14, further comprising maintaining the at least one transistor in active mode for a predetermined time period if the load is detected.

16. The battery saver method of claim 13, further comprising providing a constant current source to the microcontroller.

17. The battery saver method of claim 16, further comprising providing a voltage divider between the power supply module and the microcontroller.

18. The battery saver method of claim 13, further comprising receiving an input, via a switch, from a user.

19. The battery saver method of claim 18, further comprising:

determining whether the battery is on if the switch is activated by the user for at least a predetermined time period; and

forcing off the at least one transistor if the battery is determined to be on in the determining step.

20. The battery saver method of claim 18, further comprising:

determining whether the battery is on if the switch is activated by the user for less than a predetermined time period; and

forcing the at least one transistor to active mode if the battery is determined to be off in the determining step.

21. The battery saver method of claim 19 or 20, wherein the predetermined time period is approximately five seconds.

22. The battery saver method of claim 13, further comprising setting the threshold voltage to be approximately 11.7 volts.

23. The battery saver method of claim 13, further comprising soldering the at least one transistor to a first lead and a second lead,

wherein the first lead electrically couples the battery saver device to the battery, and the second lead electrically couples the battery saver device to an electrical load.