EV Battery Charging With Dielectric Preheating in Cold Climates
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Solution Overview
Problem
Charging electric vehicle batteries in cold climates leads to longer charging times and reduced efficiency due to adverse performance effects.
Innovation Solution
Using a charging station equipped with an electromagnetic wave generator to apply electromagnetic wave energy at a frequency that induces dielectric heating of the battery's current collectors to a suitable temperature for charging, followed by applying electrical power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional electrical power supply is used to charge batteries in cold climates, then charging can proceed, but charging time increases and efficiency decreases
Solution Approach 1:
The patent combines electromagnetic wave heating function with electrical charging function into a single charging station system. The heating device and power supply device work together to simultaneously heat the battery and deliver electrical energy, resolving the contradiction by merging two separate processes (heating and charging) into one integrated operation, thereby eliminating the need for separate preheating time and reducing total charging time in cold climates.
Solution Approach 2:
The patent applies electromagnetic wave heating to the battery before electrical charging begins. By preheating the battery to an optimal temperature range using electromagnetic waves, the battery's acceptance of electrical energy is improved, which directly addresses the charging efficiency problem in cold environments and reduces the overall charging time.
2Productivity
If electromagnetic wave heating is applied to heat the battery, then charging efficiency improves, but energy loss may increase
Solution Approach 1:
The patent changes the physical state of the battery by adjusting its temperature through electromagnetic wave heating. By controlling the temperature parameter within an optimal range before charging, the battery's electrical properties are improved, enabling more efficient energy acceptance. This parameter change approach ensures that the energy invested in heating translates to improved charging efficiency rather than net energy loss.
3Productivity
If battery temperature is increased to improve charging performance, then charging efficiency improves, but temperature control complexity increases
Solution Approach 1:
The patent replaces traditional mechanical heating systems (such as resistance heating or thermal conduction heating) with electromagnetic wave heating. This substitution simplifies the temperature control system because electromagnetic waves can directly penetrate and heat the battery internally without requiring complex external heating mechanisms, sensors, and control circuits associated with mechanical heating systems.
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
Enhances charging efficiency, reduces energy loss, and improves overall battery performance, particularly in cold environments.
Implementation Method 1
determining a frequency at which a dielectric loss of the energy storage system is above a predetermined threshold; applying electromagnetic wave energy at the determined frequency from the electromagnetic wave generator of the charging station to current collectors of the energy storage system to dielectrically heat the energy storage system
Data Source
AI summary
A method for charging an energy storage system of an electric vehicle using a charging station equipped with an electrical power supply and an electromagnetic wave generator, the method comprising: connecting the charging station to an electric vehicle; determining a frequency at which a dielectric loss of the energy storage system is above a predetermined threshold; applying electromagnetic wave energy at the determined frequency from the electromagnetic wave generator of the charging station to current collectors of the energy storage system to dielectrically heat the energy storage system to a temperature suitable for charging; and applying electrical power to the current collectors of the heated energy storage system to charge the energy storage system.