Electric Storage Device Magnetic Field Low Temperature Resistance
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Solution Overview
Problem
Electric storage devices, such as lithium ion capacitors, experience a significant increase in internal resistance at low temperatures, leading to degraded charge/discharge characteristics when used in a wide temperature range, particularly from -40°C to 50°C.
Innovation Solution
Incorporating a magnetic field generating unit that produces magnetic force lines in a specific direction, parallel to the stacking of positive and negative plates, to suppress the increase in internal resistance and improve charge/discharge characteristics at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric storage device is used at low temperatures, then the internal resistance increases significantly, but the charge/discharge characteristics are degraded
Solution Approach 1:
The patent applies a magnetic field to change the physical state and parameters of the electrolytic solution, specifically affecting ion mobility and conductivity. The magnetic field generating unit changes the parameter of ion transport in the electrolyte, reducing internal resistance and improving charge/discharge characteristics at low temperatures without altering the chemical composition of the components.
2Reliability
If a magnetic field generating unit is added to suppress internal resistance increase, then charge/discharge characteristics are improved, but device complexity increases
Solution Approach 1:
The magnetic field generating unit is designed as a separate, modular component that can be independently added to the electric storage device. This segmentation allows the magnetic field generation function to be implemented without redesigning the entire device structure, thereby minimizing the increase in overall device complexity while achieving the desired improvement in charge/discharge characteristics.
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 magnetic field uniformly penetrates the plates, reducing internal resistance by about half at low temperatures, thereby enhancing the charge/discharge performance and extending the life of the electric storage device by storing energy through physical adsorption of ions rather than chemical reactions.
Implementation Method 1
a magnetic field generating unit that generates magnetic force lines in a certain direction
Implementation Method 2
The magnetic field uniformly penetrates the plates, reducing internal resistance by about half at low temperatures
Implementation Method 3
storing energy through physical adsorption of ions rather than chemical reactions
Data Source
AI summary
An electric storage device has an electrode body and a housing body. The electrode body has a plurality of positive plates and a plurality of negative plates. The positive plates and the negative plates are alternately stacked on each other via separators. The housing body houses the electrode body together with an ion conductor. The electric storage device is provided with a magnetic field generating unit that generates magnetic force lines in a certain direction.