Determining battery state of charge using an open circuit voltage measured prior to a device operation stage
AssigneeSemiconductor Components Industries, LLC
InventorHideo Kondo
Life of this patent
Estimating the term…
Abstract
A system to accurately determine a battery state of charge (SOC) in an electronic device, in some embodiments, comprises: a battery to provide power to said electronic device; and a fuel gauge coupled to the battery and capable of determining an open circuit voltage (OCV) associated with the battery, wherein the fuel gauge determines said OCV after the battery is installed in the electronic device and before the electronic device enters an operation stage, wherein the fuel gauge determines a state of charge associated with the battery based on said OCV.
Claims19
A system to accurately determine a battery state of charge (SOC) in an electronic device, comprising:
- a fuel gauge configured to determine an open circuit voltage (OCV) associated with a battery,
- wherein the fuel gauge determines said OCV after the battery is installed in the electronic device and before the electronic device enters an operation stage,
- wherein the fuel gauge determines a state of charge associated with the battery based on said OCV,
- wherein the fuel gauge enters a standby mode after determining said OCV and before the electronic device enters the operation stage,
- wherein the fuel gauge enters an operation mode from the standby mode when the electronic device enters the operation stage, and
- wherein the fuel gauge consumes less power during the standby mode than is consumed prior to entering the standby mode and less power than is consumed after entering the operation mode.
An electronic device, comprising:
- a fuel gauge configured to determine an open circuit voltage (OCV) of a battery before said electronic device enters an operation stage,
- wherein, after said battery is installed in the electronic device, said battery remains installed in the electronic device at least until the electronic device enters the operation stage,
- wherein the fuel gauge enters a standby mode after determining said OCV and before the electronic device enters the operation stage,
- wherein the fuel gauge enters an operation mode from the standby mode when the electronic device enters the operation stage, and
- wherein the fuel gauge consumes less power during the standby mode than is consumed prior to entering the standby mode and less power than is consumed after entering the operation mode.
A method for determining a battery state of charge in an electronic device, comprising:
- determining an open circuit voltage (OCV) of a battery installed in the electronic device while said battery remains installed in said electronic device;
- after determining said OCV, causing the electronic device to enter an operation stage while said battery remains installed in said electronic device;
- and
- determining a state of charge of the battery using said OCV,
- wherein the determining the OCV of the battery is performed by a fuel gauge that enters a standby stage after determining said OCV and before the electronic device enters the operation stage,
- wherein the fuel gauge enters an operation mode from the standby mode when the electronic device enters the operation stage, and
- wherein the fuel gauge consumes less power during the standby stage than is consumed prior to entering the standby stage and less power than is consumed after entering the operation mode.
Dependencies are inferred from the claim text.