MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202641122853 A) filed by Blubble Private Limited on October 14, 2026, for Method For Matching Second-Life Battery Applications Using Impedance-Derived Remaining Useful Life Estimation.
Inventors include Vignesh S; and Pidapa, Sudhindra Reddy.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: ABSTRACT METHOD FOR MATCHING SECOND-LIFE BATTERY APPLICATIONS USING IMPEDANCE-DERIVED REMAINING USEFUL LIFE ESTIMATION A method of matching a retired battery (132) to second-life applications is provided. A capacity tester (102) measures a screened capacity, giving a state of health, and an application library (110) of application profiles, each defining a minimum end-of-service state-of-health threshold and a required service life, is retrieved from a memory (108). An electrochemical impedance spectroscopy unit (104) acquires an impedance spectrum, and a processor (116) extracts a Warburg coefficient from a low-frequency region of the spectrum. A ratio of the extracted to an expected Warburg coefficient from a reference model (112) determines a state- of-health fade rate. For each second-life application, a service duration is determined as a state-of-health headroom divided by the state-of-health fade rate, and a suitability score compares the service duration with the required service life to output a ranked result. (Figure 1)
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