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US 12,768,899 B2Granted
Intelligent power management system and method for monitoring battery integrity
AssigneeSemiconductor Components Industries, LLC
InventorHideo Kondo
Life of this patent
Estimating the term…
Abstract
A battery monitoring system for a battery of a battery electric system includes a sensor array, a processor, and memory. Execution of the instructions by a processor according to a method causes the processor to receive parameters of the battery from the sensor array, calculate a rate of increase of an internal resistance (ΔR ratio) of the battery across multiple states of charge of the battery, compare the ΔR ratio to one or more degradation thresholds, and record a corresponding degradation level of the battery in the memory when the ΔR ratio exceeds the degradation threshold(s). A state of health notice may be transmitted to a remote device.
Claims20
A system for monitoring a battery of a battery electric system, the system comprising:
- a sensor array configured to measure a voltage, a current, and a temperature of the battery as a set of battery parameters;
- a processor;
- and
- a non-transitory computer-readable storage medium (“memory”), the memory including instructions executable by the processor to cause the processor to:
- receive the set of battery parameters from the sensor array during a predetermined operating mode of the battery, the predetermined operating mode being a charging mode of the battery or a discharging mode of the battery;
- calculate, using the set of battery parameters, an internal resistance of the battery at two different states of charge of the battery;
- calculate, using the internal resistance of the battery at the two different states of charge of the battery, a rate of increase of an internal resistance of the battery across the two different states of charge of the battery as a delta resistance (AR) ratio;
- determine a degradation level of the battery using the AR ratio, including comparing the delta resistance (AR) ratio to a plurality of degradation thresholds;
- and
- execute a control action of the battery in response to the degradation level, including:
- recording the degradation level of the battery in the memory;
- and
- when the degradation level exceeds a predetermined one of the plurality of degradation thresholds:
- (i) commanding a disconnecting of the battery from a load, or (ii) commanding prevention of charging of the battery.
11 more elements
A method for monitoring a battery in a battery electric system, the method comprising:
- measuring a set of battery parameters of the battery using a sensor array of a battery monitoring system;
- calculating an internal resistance of the battery at two different states of charge of the battery during a charging mode or a discharging mode of the battery;
- calculating, via a processor of the battery monitoring system using the internal resistance, a rate of increase of an internal resistance (ΔR ratio) of the battery across the two different states of charge of the battery;
- determine a corresponding degradation level of the battery using the ΔR ratio by comparing the ΔR ratio to a plurality of degradation thresholds;
- recording the corresponding degradation level of the battery in memory of the battery monitoring system;
- and
- executing a control action of the battery in response to the recording the corresponding degradation level, the control action including transmitting a state of health notice to a remote device, and, when the degradation level exceeds a predetermined threshold that is one of the plurality of degradation thresholds:
- (i) commanding a disconnecting of the battery from a load, or (ii) commanding prevention of charging of the battery.
5 more elements
A battery electric system for powering a load, comprising:
- an electrical disconnect switch;
- a battery that is selectively connectable to the load via the electrical disconnect switch;
- a sensor array connected to the battery and configured to measure a voltage, a current, and a temperature of the battery as battery parameters;
- and
- an electronic monitoring unit (EMU) having a processor and a non-transitory computer-readable storage medium (“memory”), the memory including instructions executable by the processor to cause the EMU to:
- receive the battery parameters from the sensor array during a predetermined operating mode of the battery, the predetermined operating mode including a charging mode of the battery or a discharging mode of the battery;
- calculate a first internal resistance (R1) of the battery at a first state of charge (SOC-1) of the battery using the battery parameters;
- calculate a second internal resistance (R2) of the battery at a second state of charge (SOC-2) of the battery using the battery parameters, the first state of charge (SOC-1) exceeding the second state of charge (SOC-2);
- calculate a delta resistance (ΔR) ratio as a function (ƒ) of the first internal resistance (R1) and the second resistance (R2), wherein ƒ=(R2−R1)/R1×100%;
- determine the degradation level of the battery using the ΔR ratio;
- and
- execute a control action of the battery in response to the degradation level, including, when the degradation level exceeds a predetermined threshold that is one of the degradation thresholds:
- (i) commanding a disconnecting of the battery from the load, or (ii) commanding preventing a charging of the battery.
10 more elements
Dependencies are inferred from the claim text.