20240053406. METHOD FOR ESTIMATING DIRECT CURRENT INTERNAL RESISTANCE OF BATTERY simplified abstract (STL TECHNOLOGY CO., LTD.)
Contents
METHOD FOR ESTIMATING DIRECT CURRENT INTERNAL RESISTANCE OF BATTERY
Organization Name
Inventor(s)
Shih Fa Hung of KAOHSIUNG CITY (TW)
Chong-Yong Wu of KAOHSIUNG CITY (TW)
Wen-Fan Chang of KAOHSIUNG CITY (TW)
METHOD FOR ESTIMATING DIRECT CURRENT INTERNAL RESISTANCE OF BATTERY - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240053406 titled 'METHOD FOR ESTIMATING DIRECT CURRENT INTERNAL RESISTANCE OF BATTERY
Simplified Explanation
The invention presents a method for estimating the direct current internal resistance of a battery by monitoring the depth of discharge during the discharging process.
- Periodically measure the currently battery voltage while the battery is discharging.
- Calculate the currently depth of discharge and query the open-circuit voltage.
- Subtract the currently battery voltage from the open-circuit voltage to obtain a voltage difference.
- Continuously accumulate the voltage differences to obtain a currently accumulated voltage difference.
- When the currently depth of discharge reaches certain thresholds, the currently accumulated voltage difference is categorized accordingly.
- Divide the difference value between the accumulated voltage differences by the discharging amount to obtain the direct current internal resistance.
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- Potential Applications
- Battery management systems
- Electric vehicles
- Renewable energy storage systems
- Problems Solved
- Accurately estimating the internal resistance of a battery during discharge
- Improving battery performance and longevity
- Enhancing safety by monitoring battery health in real-time
- Benefits
- Optimize battery charging and discharging processes
- Prevent overcharging and over-discharging
- Extend battery lifespan and improve overall efficiency
Original Abstract Submitted
the invention presents a method for estimating a direct current internal resistance of a battery, which defines a depth of discharge detection interval including a first threshold and a second threshold. when the battery is discharging, a currently battery voltage are periodically measured, a currently depth of discharge is calculated, and an open-circuit voltage is queried. the currently battery voltage is subtracted from the open-circuit voltage to obtain a voltage difference. the voltage difference is continuously accumulated to obtain a currently accumulated voltage difference. the currently depth of discharge reaches the first threshold or the second threshold, the currently accumulated voltage difference is a first accumulated voltage difference or a second accumulated voltage difference. a difference value between the first accumulated voltage difference and the second accumulated voltage difference is divided by a discharging amount in the depth of discharge detection interval to obtain the direct current internal resistance.
