High-speed, low-dimensional electrochemical models for lithium-ion batteries at diverse charge-discharge rates
Low-dimensional electrochemical models using polynomial functions for lithium-ion batteries enhance battery management systems by accurately predicting terminal voltage and degradation, addressing computational challenges of physics-based models.
JP2026519964APending Publication Date: 2026-06-19THE RGT UNIV OF MICHIGAN
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- THE RGT UNIV OF MICHIGAN
- Filing Date
- 2024-04-25
- Publication Date
- 2026-06-19
Smart Images
Figure 2026519964000001_ABST
Abstract
The electrical device may include a battery comprising one or more electrochemical cells, a temperature sensor located in at least one of the plurality of electrochemical cells, a current sensor for measuring the current flowing from the battery, and a battery management system comprising a controller that electrically communicates with the temperature sensor and the current sensor. The controller is configured to (i) calculate the terminal voltage of the battery using an electrochemical model that receives the temperature read from the temperature sensor and the current flowing from the battery as inputs, and output the terminal voltage of the battery, wherein the electrochemical model calculates the terminal voltage of the battery using the lithium ion concentration distribution as a first polynomial function and the electrolyte potential distribution as a second polynomial function, and (ii) determine the state of the battery based on the terminal voltage.
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