PCM Cabin Heating for EV Cold-Weather Energy Saving

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Solution Overview

Problem

Electric vehicles face challenges in maintaining optimal battery performance and cabin comfort in cold environments, as conventional heating methods consume stored electrical energy and can damage batteries, especially at low temperatures.

Innovation Solution

Utilizing high-frequency AC current electrolyte heating and Phase Change Material (PCM) heat energy storage devices powered by external sources to rapidly heat batteries and cabins, minimizing energy consumption and damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional heating methods are used to heat the cabin in cold environments, then the cabin temperature is improved, but the stored electrical energy is depleted and battery life is reduced

Engineering Contradiction:

Improvecabin temperatureVSAvoidstored electrical energy

Core Design Contradiction:

TemperatureVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary heating of the cabin using external power sources (such as renewable energy systems) before the vehicle is put into operation. This allows the cabin to be pre-heated without depleting the stored electrical energy that would be needed for vehicle operation, thereby resolving the contradiction between maintaining comfortable cabin temperature and preserving energy for driving.

Inventive Principle:

Principle #10Preliminary action

2Temperature

If conventional heating methods are used to heat the battery in cold environments, then the battery temperature is improved, but the battery is damaged and battery life is reduced

Engineering Contradiction:

Improvebattery temperatureVSAvoidbattery life

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The system replaces conventional resistive heating methods with a temperature-controlled heating system that uses external power sources. This system carefully regulates the heating process to bring the battery to optimal operating temperature without exceeding damage thresholds, thereby improving battery temperature while preserving battery life and reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If the vehicle is parked outdoors in cold environments, then the vehicle is accessible for charging, but the battery and cabin temperatures deteriorate

Engineering Contradiction:

Improvecharging accessibilityVSAvoidbattery and cabin temperature

Core Design Contradiction:

Ease of operationVSTemperature

Solution Approach 1:

The system performs preliminary heating of both the battery and cabin while the vehicle is parked and connected to external power sources. This allows the vehicle to be charged and temperature-conditioned simultaneously during the parking period, ensuring that when the vehicle is put into operation, both the battery and cabin are at optimal temperatures without compromising charging accessibility.

Inventive Principle:

Principle #10Preliminary action

4Temperature

If stored electrical energy is used to heat the battery and cabin, then the temperature is improved, but the energy available for vehicle operation is reduced

Engineering Contradiction:

Improvebattery and cabin temperatureVSAvoidpower for vehicle operation

Core Design Contradiction:

TemperatureVSPower

Solution Approach 1:

The system uses external power sources (such as renewable energy systems) to service the heating needs of the battery and cabin, rather than relying on the vehicle's stored electrical energy. This allows the vehicle's power system to maintain full capacity for operation while the external sources handle the thermal management requirements during parking and charging periods.

Inventive Principle:

Principle #25Self-service

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

Efficiently heats batteries and cabins to optimal temperatures without damaging them, conserving stored energy for vehicle operation and maintaining passenger comfort.

Implementation Method 1

a newly developed method and related devices has the advantage of rapidly and efficiently heating the battery electrolyte directly using appropriately formed high frequency AC currents

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

utilizing high-frequency AC current electrolyte heating and Phase Change Material (PCM) heat energy storage devices

Methodology Applied

Scientific EffectPhase change: Phase Change

Implementation Method 3

Phase Change Material (PCM) heat energy storage devices that are heated primarily by external electrical power sources

Methodology Applied

Scientific EffectLatent heat: Latent Heat

Data Source

PatentUS20260027865A1Methods and devices for thermal management of electric vehicles and their cabins in cold environments

Publication Date: 2026.01.29 OMNITEK PARTNERS LLC

AI summary

A system for thermal management of electric vehicles. The system including: a heat energy storage system having a phase change material; and a controller comprising hardware. The controller being configured to: monitor a cabin temperature of a cabin of the electric vehicle; based on the cabin temperature, control power to the heat energy storage system to store heat energy therein; and control an airflow at least indirectly across the phase change material to convert the stored heat energy to heating the cabin.