Method for Simulating a Battery System by Specifying a Diffusion Rate During a Charging/discharging Process and Electronic Computing Device

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The invention describes a method and electronic computing device for simulating a battery system with high fidelity. It combines a kinetic battery model to represent energy transfer dynamics with an equivalent-circuit-based filter model for electrical behavior. Chiefly, it introduces a novel approach by dynamically adjusting a 'diffusion rate' (transfer rate) based on the charging current, allowing for accurate simulation of both charging and discharging processes. The model is modular, capable of representing real-world battery behaviors, including nonlinear effects like temperature dependence, aging, and self-discharge.

Use CasesContent extracted from patent full text and abstract with AI.

• Design and optimization of battery systems for electric vehicles or grid energy storage.
• Development and validation of battery management software and hardware systems.
• Predictive maintenance and lifespan estimation for battery packs in renewable energy installations.
• Training and educational tools for battery engineering students or professionals.
• Simulation-driven research for new battery chemistries or advanced energy storage technologies.
• Testing the impact of auxiliary systems (e.g., heating, cooling, pumps) on overall battery performance before physical prototyping.

BenefitsContent extracted from patent full text and abstract with AI.

• Highly accurate simulation of battery behavior during both charging and discharging, including complex real-world phenomena such as the rate-capacity and recovery effects.
• Modular and scalable: the simulation approach can be applied to individual cells or up to whole battery systems, accounting for auxiliary devices and system-level interactions.
• Reduces development and prototyping time and cost for battery-based products by enabling reliable virtual testing.
• Captures nonlinear effects (e.g., temperature dependency, aging, self-discharge) for more precise predictions than prior methods.
• Flexible and less time-consuming parameterization compared to existing complex electrochemical models.
• Facilitates rapid iteration, design comparison, and easier adaptation to different battery chemistries or configurations.

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Patent Abstract

The invention relates to a method for simulating a battery system (3) with at least one virtual voltage source (4) of the battery system (3) and at least one virtual filter device (5) of the battery system (3) by means of a simulation model (1) of an electronic computing device (2), wherein the virtual voltage source (4) is simulated by a kinetic battery model (6) with a predefined transfer rate (k) and the filter device (5) is simulated by means of an equivalent-circuit-based model (7), wherein the transfer rate (k) is predefined depending on a simulated charging current (i(t)) during a simulated charging process of the battery system (3). The invention furthermore relates to an electronic computing device (2).