Embedded Chip for Battery Thermodynamic Parameter Measurement
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Solution Overview
Problem
Current electrochemical storage and conversion systems lack accurate methods for measuring key thermodynamic parameters such as entropy, enthalpy, and Gibbs free energy, which are crucial for predicting and optimizing the performance attributes of electrode materials and systems.
Innovation Solution
The development of systems and methods that simultaneously collect and measure a suite of interconnected electrochemical and thermodynamic parameters, including state functions like Gibbs free energy, enthalpy, and entropy, using integrated circuits with voltage, temperature, and current monitoring circuits, allowing for precise characterization of electrode materials and systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If integrated circuits with multiple monitoring circuits are embedded in electrochemical cells, then measurement precision of thermodynamic parameters is improved, but device complexity increases
Solution Approach 1:
The patent combines voltage monitoring, temperature monitoring, and current monitoring circuits into a single integrated circuit chip that is embedded within the electrochemical cell. This merging of multiple monitoring functions into one device enables simultaneous measurement of multiple thermodynamic parameters (voltage, temperature, current) with high precision, while avoiding the complexity of having separate monitoring devices. The integrated circuit processes all measurements and calculates thermodynamic parameters (Gibbs free energy, enthalpy, entropy) internally, resolving the contradiction between measurement precision and device complexity.
2Reliability
If multiple thermodynamic parameters are measured simultaneously, then reliability of performance prediction is improved, but device complexity increases
Solution Approach 1:
The integrated circuit is designed with multi-functionality to simultaneously perform voltage monitoring, temperature monitoring, current monitoring, and thermodynamic parameter calculation. This universal device can measure multiple thermodynamic parameters (voltage, temperature, current) and derive multiple derived parameters (Gibbs free energy, enthalpy, entropy) in one system. The multi-functional design improves reliability of performance prediction by providing comprehensive thermodynamic data while avoiding the need for multiple separate measurement devices, thus preventing exponential increase in device complexity.
3Ease of operation
If embedded circuits are used for monitoring, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The monitoring circuit is nested within the electrochemical cell structure, with the integrated circuit chip embedded inside the cell housing. This nesting approach allows the monitoring system to be integrated into the existing cell design without requiring external connections or additional assembly steps. The circuit board is positioned within the cell and connected to internal components, making the system easy to operate as a unified device while managing manufacturing precision requirements through standardized embedding procedures rather than complex external installations.
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
Enables accurate prediction of performance attributes like energy, power density, cycle life, and state of health of electrochemical cells, facilitating the identification of new materials and optimizing existing ones, and providing detailed insights into the thermodynamics of electrode reactions.
Implementation Method 1
a voltage monitoring circuit for measuring a plurality of open circuit voltages of an electrochemical cell
Implementation Method 2
a temperature monitoring circuit for measuring a plurality of temperatures of the electrochemical cell
Implementation Method 3
a circuit for determining a thermodynamic parameter of the electrochemical cell, wherein the thermodynamic parameter is one or more of a change in entropy of the electrochemical cell, a change in enthalpy of the electrochemical cell and a change in free energy of the electrochemical cell
Data Source
AI summary
Provided are methods, systems and devices for thermodynamically evaluating electrochemical systems and components thereof, including electrochemical cells such as batteries. The present systems and methods are capable of monitoring selected electrochemical cell conditions, such as temperature, open circuit voltage and/or composition, and carrying out measurements of a number of cell parameters, including open circuit voltage, time and temperature, with accuracies large enough to allow for precise determination of thermodynamic state functions and materials properties relating to the composition, phase, states of charge, health and safety and electrochemical properties of electrodes and electrolytes in an electrochemical cell. Thermodynamic measurement systems of the present invention are highly versatile and provide information for predicting a wide range of performance attributes for virtually any electrochemical system having an electrode pair.