Battery pack for portable computer

• US 7,945,798 B2
• Filed: 10/03/2007
• Issued: 05/17/2011
• Est. Priority Date: 10/03/2007
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: Carlson, Jeremy Robert, Jakes, Philip John, Cromer, Daryl Carvis, Locker, Howard Jeffrey, Rutledge, James Stephen
• Primary Examiner(s): Cao; Chun
• Application Number:
  US11/866,528
• Publication Number:
  US 20090094465A1
• Time in Patent Office: 1,322 Days
• Field of Search: 713/324, 713/340
• US Class Current: 713/340
• 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: H01M 50/204 Racks, modules or packs for multiple batteries or multiple cells
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/247 specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A first battery assembly is in a first battery housing that is mechanically engageable with a portable computer, and a second battery assembly is in a second battery housing that is mechanically couplable to the first battery housing. A switch has a first configuration in which communication is established between the portable computer and the first battery assembly and a second configuration in which communication is established between the portable computer and the second battery assembly.

Claims

1. A battery pack for a portable computer, comprising:

a first battery assembly in a first battery housing, the first battery housing being mechanically engageable with the portable computer, wherein the first battery assembly includes a first battery, a first power line switch connected to the first battery, and a first battery processor controlling the first power line switch; and

a second battery assembly in a second battery housing mechanically couplable to the first battery housing, wherein the second battery assembly includes a second battery, a second power line switch connected to the second battery, and a second battery processor controlling the second power line switch;

wherein communication is established between the portable computer, the first battery assembly, and the second battery assembly;

wherein the computer causes the processors to control their respective power line switches so that only one of the batteries at a time is connected to the computer.

2. The battery pack of claim 1, comprising the portable computer engaged with the first battery housing.

3. The battery pack of claim 1, wherein the first battery assembly is identical in configuration to the second battery assembly.

4. The battery pack of claim 1, wherein the first battery assembly is not identical in configuration to the second battery assembly.

5. The battery pack of claim 1, wherein the first switch and the second switch each communicate at least a data signal, a clock signal, and a temperature signal between the computer and a computer-selected one of the battery processors.

6. The battery pack of claim 1, comprising the portable computer engaged with the second battery housing.

7. A computer assembly, comprising:

a portable computer, including a battery connector;

a first battery housing mechanically engageable with the portable computer, the first battery housing holding a first battery assembly including a first battery;

wherein during a first period the portable computer controls a second battery assembly including a second battery housing mechanically engageable with the first battery housing and holding a second battery assembly including a second battery to supply power to the portable computer;

wherein during a second period the portable computer controls the first battery assembly to supply power to the portable computer, such that during the second period the second battery housing can be removed from the first battery housing and engaged with an external charger to recharge the second battery while the first battery provides power to the computer; and

wherein the battery connector is configured to support the first and second batteries such that no switch is needed to route communication from the portable computer to select one of the battery assemblies, wherein the first battery assembly includes a first power line switch connected to the first battery and a first battery processor controlling the first power line switch, the second battery assembly includes a second power line switch connected to the second battery and a second battery processor controlling the second power line switch, and the computer causes the processors to control their respective power line switches so that only one of the batteries at a time is connected to the computer.

8. The assembly of claim 7, wherein the first battery assembly is identical in configuration to the second battery assembly.

9. The assembly of claim 7, wherein the first battery assembly is not identical in configuration to the second battery assembly.

10. The assembly of claim 7, wherein the switch communicates at least a data signal, a clock signal, and a temperature signal between the computer and a computer-selected one of the battery assemblies.

11. A method, comprising:

electrically engaging a first removable rechargeable battery with a portable computer;

mechanically coupling a second battery housing holding a second battery assembly with a first battery housing associated with the first battery assembly;

selectively routing data communication from the computer to the first or second battery assembly;

wherein the first battery assembly includes a first power line switch connected to the first battery, and a first battery processor controlling the first power line switch;

wherein the second battery assembly includes a second power line switch connected to the second battery, and a second battery processor controlling the second power line switch; and

wherein the computer causes the processors to control their respective power line switches so that only one of the batteries at a time is electrically connected to the computer.

12. The method of claim 11, wherein the first battery assembly is identical in configuration to the second battery assembly.

13. The method of claim 11, wherein the first battery assembly is not identical in configuration to the second battery assembly.

14. The method of claim 11, wherein the data communication includes at least a data signal, a clock signal, and a temperature signal between the computer and a computer-selected one of the battery processors.