Porous Battery Temperature Sensor for Ion Flow
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Solution Overview
Problem
Accurate and precise monitoring of rechargeable battery temperature is challenging due to the impact of operating parameters on energy charging, discharging, and life-cycle performance.
Innovation Solution
A temperature sensor is integrated into the rechargeable battery cell, comprising a resistive sensing element and electrodes affixed to a porous separator between the anode and cathode, allowing for precise temperature measurement without disrupting ion flow, using materials like gold, nickel, or conductive carbon black, and a reference electrode for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is integrated into the battery cell, then temperature monitoring accuracy is improved, but ion flow disruption increases
Solution Approach 1:
The temperature sensor electrodes are fabricated as porous structures with pore sizes matching the separator pores, allowing lithium ions to pass through the sensor material while the resistive element measures temperature. This resolves the contradiction by enabling both accurate temperature monitoring and uninterrupted ion flow through the use of porous materials that are permeable to ions.
2Object-generated harmful factors
If the sensor electrodes are made porous to match separator permeability, then ion flow disruption is reduced, but manufacturing complexity increases
Solution Approach 1:
The sensor electrodes are deposited as thin films with controlled porosity parameters matching the separator's pore size and permeability characteristics. By controlling the deposition parameters (thickness, porosity, conductivity), the sensor achieves both ion permeability and electrical functionality, resolving the manufacturing complexity issue through parameter optimization rather than complex multi-step fabrication.
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 solution enables accurate temperature monitoring within the battery cell, minimizing interference with lithium migration and providing quick response to temperature changes, thus improving battery performance and life-cycle efficiency.
Implementation Method 1
a resistive sensing element, a first electrode, and a second electrode, all of which are affixed to a porous separator
Data Source
AI summary
A temperature sensor for a battery cell of a rechargeable battery is described, and includes a resistive sensing element, a first electrode, and a second electrode. The resistive sensing element, the first electrode, and the second electrode are affixed to a porous separator. The porous separator is interposed between an anode and a cathode of the battery cell. The resistive sensing element is electrically connected in series between the first electrode and the second electrode, and the resistive sensing element, the first electrode and the second electrode are affixed onto the separator as film layers, and are porous.