Abstract: Implementations of fuel gauges may include a voltage sensor coupled with a memory, a processor coupled with the memory, a mode control logic circuit coupled with the voltage sensor, and a sampling timer coupled with the voltage sensor. The memory may include a plurality of relative state of charge (RSOC) values of a battery. The plurality of RSOC values may be used to calculate a plurality of internal resistance values. The fuel gauge may be configured to either increase, decrease, or maintain a sampling frequency based upon a measured power being drawn by a load coupled to the battery.

Abstract: Various embodiments of the present technology comprise a method and system for induction heating. The system may provide a first induction coil wrapped around a metal cylinder and a second induction coil wrapped around the metal cylinder. The first induction coil may carry a current in a first direction and the second induction coil may carry a current in an opposite, second direction. The currents may be generated in an alternating sequence.

Abstract: A method, system, and integrated circuit are provided for testing a battery within a host device for abnormal conditions. The method includes charging the battery to a fully charged state, then, applying a known load to the battery and discharging the battery to a designated depth of voltage. The known load is removed from the battery, and the open circuit voltage (OCV) of the battery is monitored over time to determine an elapsed time over which the OCV recovers to a designated recovery voltage value. Based on the determined elapsed time, the method determines if the battery has a dangerous condition.

Abstract: According to an aspect, a battery system for controlling a charging current includes a temperature sensor configured to measure a temperature of a first battery, a state-of-charge (SoC) calculation engine configured to calculate an SoC value of the first battery, and a charge current controller configured to determine an adjusted current according to a charge profile based on the temperature and the SoC value, where the charge current controller is configured to transmit current data that indicates the adjusted current to a device.

Abstract: A method, system, and integrated circuit are provided for monitoring a battery within a host device for abnormal conditions. A first temperature is determined for a battery at a first state-of-charge (SOC) of the battery during a charge action. A second temperature for the battery at a second SOC of the battery during the charge action is determined, and a current delta-SOC for the charge action is determined. A memory in the host device holding delta-SOC temperature data associated with a plurality of delta-SOCs is accessed. Based on this, a determination is made as to whether a battery temperature increase for the charge action at the current delta-SOC is abnormal, the delta-SOC temperature data including at least first data associated with a normal battery performance profile and second data associated with an abnormal battery performance profile.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery system. The apparatus may provide a fuel gauge circuit that operates in conjunction with a protection circuit to control discharging and/or current leakage at exposed terminals of the apparatus.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may provide a fuel gauge circuit that operates in conjunction with a charger to perform a pre-charging operation of the battery in the event the battery has experienced an over-discharge. The pre-charging operation is defined by a period of time selected according to a measured state of charge and/or an internal resistance of the battery.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery system. The apparatus may provide a protection control circuit to detect undesired battery conditions and a fuel gauge circuit to confirm the detected battery condition, record the detected condition, and report the recorded conditions.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may be configured to prevent leakage current from the battery to a number of sub-systems by selectively operating switches that connect the battery to the sub-systems. Operation of the switches may be based on whether the battery is charging or discharging and the capacity of the battery.

Abstract: Various embodiments of the present technology may comprise methods and apparatus to determine an RSOC value of a battery. The methods and apparatus may comprise utilizing various parameters, such as voltage and/or current, to calculate the RSOC of the battery. In various embodiments, the methods and apparatus may display one of a first RSOC and a second RSOC. In various embodiments, the methods and apparatus may further detect changes in the relevant parameter(s), adjust a previously-reported RSOC of the battery accordingly, and report the adjusted RSOC.

Abstract: A system for it inhibiting the excessive discharge of a battery in an electronic device, in some embodiments, comprises: a battery to supply power to the electronic device; and a fuel gauge coupled to the battery to monitor said power, wherein the fuel gauge enters a standby mode upon determining that a voltage supplied by the battery is at or below a voltage threshold and that a capacity of the battery is at or below a capacity threshold.

Abstract: According to an aspect, a battery system includes a current sensor configured to measure a current that charges or discharges a battery, a voltage monitor configured to measure a cell voltage of the battery, a state-of-charge (SoC) calculation engine configured to calculate an SoC value, and an energy calculation engine configured to compute charge energy loss of the battery for a sampling period based on the current, cell voltage, and the SoC value and compute a capacity degradation metric based on the charge energy loss and reference charge loss of a reference battery. The energy calculation engine is configured to transmit, via an interface, the capacity degradation metric to a battery manager of a device.

Abstract: According to an aspect, a battery system for controlling a charging current includes a temperature sensor configured to measure a temperature of a first battery, a state-of-charge (SoC) calculation engine configured to calculate an SoC value of the first battery, and a charge current controller configured to determine an adjusted current according to a charge profile based on the temperature and the SoC value, where the charge current controller is configured to transmit current data that indicates the adjusted current to a device.

Abstract: According to an aspect, a battery system includes a current sensor configured to measure a current that charges or discharges a battery, a voltage monitor configured to measure a cell voltage of the battery, a state-of-charge (SoC) calculation engine configured to calculate an SoC value, and an energy calculation engine configured to compute charge energy loss of the battery for a sampling period based on the current, cell voltage, and the SoC value and compute a capacity degradation metric based on the charge energy loss and reference charge loss of a reference battery. The energy calculation engine is configured to transmit, via an interface, the capacity degradation metric to a battery manager of a device.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may determine a first current according to a first technique and a second current according to a second technique. The apparatus may use a Kalman filter to compute the state of charge of the battery, wherein the Kalman filter uses one of the first current and the second current based on a comparison of the second current to a threshold current.

Abstract: Various embodiments of the present technology may provide methods and system for a battery. The system may provide a fuel gauge circuit configured to select an energy curve from a plurality of energy curves and determine a remaining energy value based on the selected energy curve and a computed remaining capacity of the battery. The fuel gauge circuit controls a current to a load based on the remaining energy value.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may provide a fuel gauge circuit that operates in conjunction with a charger to perform a pre-charging operation of the battery in the event the battery has experienced an over-discharge. The pre-charging operation is defined by a period of time selected according to a measured state of charge and/or an internal resistance of the battery.

Abstract: Various embodiments of the present technology may provide methods and system for a battery. The system may provide a fuel gauge circuit connected to a battery, a sense resistor, and a bypass circuit to direct a discharge current away from a sense resistor. The fuel gauge circuit may control operation of the bypass circuit.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may be configured to autonomously select an appropriate battery profile for a given battery. Autonomous selection may be achieved by measuring the time that the battery voltage is within a specified range and comparing the time results to a reference table having known battery data.

Abstract: Various embodiments of the present technology may provide methods and apparatus for managing a battery system. The apparatus may provide a power line to connect a battery to a signal converter and a fuel gauge circuit to measure a voltage of the power line, detect noise on the power line, and control operation of a sensor and/or the fuel gauge circuit in response to the detected noise.