The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2024
Filed:
Sep. 09, 2021
O2micro Inc., Santa Clara, CA (US);
Deman Zhang, Shanghai, CN;
Yalei Meng, Shanghai, CN;
O2Micro Inc., Santa Clara, CA (US);
Abstract
In a portable device, a load module includes a discharge switch for discharging a battery pack, and a detection circuit that detects a protection signal to control the discharge switch. A charge module includes a charge switch for charging the battery pack, and a detection circuit that detects the protection signal to control the charge switch. The battery pack includes a protection terminal that provides the protection signal, and protection circuitry that sets the protection signal to a state according to the battery pack's status. The protection signal turns the charge switch on and the discharge switch off if the protection signal is in a first state, turns the charge switch off and the discharge switch on if it's in a second state, turns the charge and discharge switches off if it's in a third state, and turns the charge and discharge switches on if it's in a fourth state.