Methods for determining the lifespan of electrochemical components in a battery pack in real time

By measuring current and temperature values, and combining the application's cutoff voltage and background current, the usable time of the battery is calculated using the formula C x Kp x R/(Imoy+Iad), which solves the problem of inaccurate life estimation of lithium thionyl chloride batteries in the prior art and achieves accurate real-time life prediction.

CN115298560BActive Publication Date: 2026-07-03SAFT BATTERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SAFT BATTERY CO LTD
Filing Date
2021-03-11
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies struggle to accurately determine the remaining lifespan of lithium thionyl chloride electrochemical batteries in real time and fail to consider the specificities of each application, leading to inaccurate battery replacement timing.

Method used

By measuring current and temperature values, and combining the application's cutoff voltage and background current, the battery's usable time is calculated using the formula C x Kp x R/(Imoy+Iad). The battery's lifespan estimate is dynamically adjusted by taking into account factors such as the application's maximum current, average current, temperature, and self-discharge current.

Benefits of technology

It achieves accurate real-time lifetime estimation for lithium thionyl chloride batteries, taking into account the specificities of each application and improving the accuracy of lifetime prediction.

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Abstract

This invention relates to a method for determining the lifetime of electrochemical elements in a battery pack in real time based on a defined application, applicable to the field of primary battery packs. The method includes: - a measurement step (1), measuring at least one current intensity value (I) provided by the electrochemical element and measuring at least one temperature value (T) of the electrochemical element in the defined application; - a total lifetime calculation step (4), allowing the usable time of the electrochemical element to be calculated based on a defined initial time, according to at least one current intensity value (I) and at least one temperature value (T) measured during measurement step (1), a defined value of the capacity of the electrochemical element, a defined cutoff voltage for the defined application, and a defined background current for the defined application.
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