Battery system for battery degradation estimation
AssigneeSemiconductor Components Industries, LLC
InventorHideo Kondo
Life of this patent
Estimating the term…
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.
Claims20
A battery system comprising:
- 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 configured to transmit, via an interface, the capacity degradation metric to a battery manager of a device.
A device comprising:
- a battery;
- a current sensor configured to measure a current that charges or discharges the battery;
- a voltage monitor configured to measure a cell voltage of the battery;
- a state-of-charge (SoC) calculation engine configured to obtain SoC value;
- and
- an energy calculation engine configured to:
- compute charge energy loss of the battery for a sampling period based on the current, the 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;
- and
- a battery manager configured to receive, via an interface, the capacity degradation metric from the energy calculation engine.
A method comprising:
- measuring a current that charges or discharges a battery;
- measuring a cell voltage of the battery;
- calculating a state-of-charge (SoC) value;
- computing charge energy loss of the battery for a sampling period based on the current, the cell voltage, and the SoC value;
- computing a capacity degradation metric based on the charge energy loss and reference charge loss of a reference battery;
- and
- transmitting, via an interface, the capacity degradation metric to a battery manager of a device.
Dependencies are inferred from the claim text.