Battery Charging Control via Diffusion Characteristics
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Solution Overview
Problem
Existing battery charging methods lack efficiency in determining optimal current magnitudes based on the diffusion characteristics of battery materials, leading to suboptimal charging speeds and potential battery degradation.
Innovation Solution
A battery charging control method that adjusts current input based on diffusion characteristics of the cathode, anode, and electrolyte, using a charging speed coefficient calculated from cathode, anode, and electrolyte diffusion coefficients, to prevent battery degradation and optimize charging speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant current-constant voltage (CCCV) charging method is used, then charging process is simple and reliable, but charging speed is suboptimal and cannot adapt to battery's changing diffusion characteristics
Solution Approach 1:
The patent implements dynamic charging control by continuously monitoring battery parameters (voltage, current, temperature) and adjusting charging current in real-time based on the battery's state of charge and diffusion characteristics, transitioning from static CCCV to adaptive dynamic charging that optimizes charging speed while preventing degradation
Solution Approach 2:
The system employs feedback mechanisms by measuring battery voltage, current, and temperature during charging, comparing these against reference values and diffusion characteristics, and using the deviations to adjust charging parameters through control algorithms, creating a closed-loop adaptive charging system
2Productivity
If high current is applied to charge battery quickly, then charging speed increases, but battery degradation occurs due to exceeding diffusion characteristics
Solution Approach 1:
The patent changes charging parameters (current magnitude, voltage levels, temperature thresholds) based on the battery's state of charge and diffusion characteristics, adjusting these parameters dynamically to prevent exceeding material diffusion limits while maintaining optimal charging speed throughout the charging process
Solution Approach 2:
The system applies beforehand cushioning by establishing safety margins and threshold limits for charging current based on predicted diffusion characteristics before degradation occurs, preventing harmful conditions by adjusting current proactively when approaching critical thresholds rather than reacting after damage begins
3Productivity
If charging control is based on diffusion characteristics, then charging efficiency and battery protection are optimized, but measurement and control complexity increases
Solution Approach 1:
The patent uses intermediary parameters (voltage, current, temperature measurements) that are easily obtainable through standard sensors to infer and estimate the battery's diffusion characteristics, avoiding direct measurement of diffusion coefficients while still capturing their effects on charging behavior through observable electrical and thermal parameters
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively adjusts current input to match the battery's internal state, enhancing charging efficiency while preventing degradation by identifying and responding to changes in diffusion characteristics, thus optimizing battery charging.
Implementation Method 1
identifying a current diffusion characteristic of a material in the battery and determining whether to change the magnitude of the current to be input to the battery based on the identified diffusion characteristic of the material
Data Source
AI summary
A battery charging control method and apparatus is disclosed. The battery charging control method includes inputting a preset magnitude of a current to a battery during a preset period of time, identifying a diffusion characteristic of a material in the battery, and determining whether to change the magnitude of the current to be input to the battery based on the identified diffusion characteristic of the material, in which the diffusion characteristic may be determined based on a distribution of the material in one or more of a cathode of the battery, an anode of the battery, and an electrolyte of the battery in response to the input of the current in the battery.