FAST CHARGING SYSTEM AND METHOD

• US 20120299532A1
• Filed: 05/24/2011
• Published: 11/29/2012
• Est. Priority Date: 05/24/2011
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: Seethaler, Kenneth Scott, Odaohhara, Shigefumi, Estes, Larry Glenn, Carlson, Jeremy Robert
• Granted Patent: US 8,669,736 B2
• Time in Patent Office: Days
• US Class Current: 320/107
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A system and method include detecting whether a fast charger module is coupled to a system having a processor and a memory device. If the fast charger module is coupled to the system, a fast charging current is provided from the fast charger module at multiple selectable voltage levels via an internal charger. If the fast charger module is not detected as coupled to the system, a charging current is provided from an AC adapter via the internal charger.

Claims

1. An apparatus comprising:

an enclosure including a processor and memory device;

an internal charger to receive DC power from an external supply and provide charging current to charge a battery;

a battery connector to receive current from the internal charger and to provide current to the processor and memory devices;

a fast charge connector to receive a fast charging current from a fast charger module at multiple selectable voltage levels and selectively couple the fast charging current to the internal charger.

2. The apparatus of claim 1 and further including a voltage selection module to couple to the fast charger module and control the fast charger module to provide a selected voltage level.

3. The apparatus of claim 2 wherein the voltage selection module selects the voltage level as a function of a type of battery coupled to the battery connector.

4. The apparatus of claim 3 wherein the selected voltages levels include 13V and 17V.

5. The apparatus of claim 1 and further comprising:

an internal charger switch coupled between the internal charge circuit and the battery connector; and

a DC input switch coupled between a DC input and the internal charger circuit.

6. The apparatus of claim 5 and further comprising a current control device coupled between the fast charge connector and the internal charger.

7. The apparatus of claim 1 and further comprising a current control device coupled between the battery connector and the processor and memory devices.

8. The apparatus of claim 1 and further comprising a fast charge module coupled to the fast charge connector.

10. The system of claim 8 and further comprising a current control device coupled between the battery connector and the processor and memory devices.

9. A system comprising:

an enclosure including a processor and memory devices;

an internal charger within the frame to receive DC power from an external supply and provide charging current to charge a battery;

a battery connector to receive current from the internal charger and to provide current to the processor and memory devices from a battery when connected;

a fast charge connector to receive a fast charging current from a charger module at multiple selectable voltage levels and selectively couple the fast charging current to the internal charger;

an internal charger switch coupled between the internal charge circuit and the battery connector;

a DC input switch coupled between the a DC input and the internal charger circuit; and

a current control device coupled between the fast charge connector and the internal charger.

11. The system of claim 9 and further including a voltage selection module to couple to the fast charger module and control the fast charger module to provide a selected voltage level.

12. The system of claim 11 wherein the voltage selection module selects the voltage level as a function of a type of battery coupled to the battery connector.

13. The system of claim 12 wherein the selected voltages levels include 13V and 17V.

14. The system of claim 13 and further comprising a current control device coupled between the fast charge connector and the internal charger.

15. The system of claim 14 and further comprising a current control device coupled between the battery connector and the processor and memory devices.

16. The system of claim 9 and further comprising a fast charge module coupled to the fast charge connector.

17. The system of claim 9 wherein the internal charger is adapted to control the switches.

18. A method comprising:

detecting whether a fast charger module is coupled to a system having a processor and a memory device;

if the fast charger module is coupled to the system, providing a fast charging current from the fast charger module at multiple selectable voltage levels via an internal charger; and

if the fast charger module is not detected as coupled to the system, providing a charging current from an AC adapter via the internal charger.

19. The method of claim 18 wherein providing current to a battery from the internal charger comprises closing a switch between the internal charger and a battery connector.

20. The method of claim 18 wherein providing current to a battery from the fast charger comprises closing a switch between the fast charger and the internal charger and opening a switch between the internal charger and the AC adapter.

21. The method of claim 18 wherein providing current to a battery from the fast charger further comprises providing current to the processor and memory device from the fast charger via a current control device.

22. The method of claim 19 and further comprising providing current from the battery to the processor and memory device via a separate current control device.