Invention Grant
- Patent Title: System and method for information handling system battery charge protection and fault alarm
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Application No.: US11844407Application Date: 2007-08-24
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Publication No.: US08552689B2Publication Date: 2013-10-08
- Inventor: Ligong Wang , Gerald Courtney, Jr. , Yin-Cheung Ma
- Applicant: Ligong Wang , Gerald Courtney, Jr. , Yin-Cheung Ma
- Applicant Address: US TX Round Rock
- Assignee: Dell Products L.P.
- Current Assignee: Dell Products L.P.
- Current Assignee Address: US TX Round Rock
- Agency: Terrile, Cannatti, Chambers & Holland, LLP
- Agent Robert W. Holland
- Main IPC: H01M10/44
- IPC: H01M10/44 ; H01M10/46

Abstract:
An information handling system battery has first and second protective circuits to detect and address faults for a first charge applied from an external power source to an integrated charger and a second charge applied from a charger of an information handling system to battery cells. If the first protective circuit detects a fault associated with the integrated charger, charging of the battery cells is still supported by inserting the battery in an information handling system. If the second protective circuit detects a fault, the battery becomes inoperative by disconnecting the battery cells. An indicator, such as LEDs on the battery casing, indicates whether a soft or hard fault has occurred.
Public/Granted literature
- US20090051315A1 System and Method for Information Handling System Battery Charge Protection and Fault Alarm Public/Granted day:2009-02-26
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