Heating rod, heating module including same, and heating device including same

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Solution Overview

Problem

Electric vehicles generate less waste heat than internal combustion engine vehicles, requiring additional heating devices with improved energy efficiency and durability, while also facing challenges in reducing heat loss and structural damage from vehicle rocking.

Innovation Solution

A heating rod with a ceramic substrate and thermal diffusion plates, featuring multiple layers with specific materials like copper, molybdenum, and silver, and porous radiation fins, which enhance thermal diffusion and surface resistivity, and are designed for efficient heat transfer and structural stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a heating device is added to electric vehicles to compensate for lack of waste heat, then heating function is improved, but energy efficiency deteriorates

Engineering Contradiction:

Improveheating functionVSAvoidenergy efficiency

Core Design Contradiction:

TemperatureVSUse of energy by moving object

Solution Approach 1:

The patent changes the physical parameters of the heating element by using PTC (positive temperature coefficient) material whose resistance increases with temperature. This automatic parameter change allows the heater to reduce power consumption when reaching target temperature, improving energy efficiency while maintaining heating function

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent incorporates temperature sensing feedback through the PTC material's inherent property where resistance changes with temperature. This feedback mechanism automatically regulates heating power without external control, preventing energy waste and improving overall energy efficiency of the heating system

Inventive Principle:

Principle #23Feedback

2Ease of manufacture

If heating device structure is simplified to reduce cost, then manufacturing ease is improved, but durability deteriorates due to structural damage from vehicle rocking

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoiddurability against structural damage

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent uses composite construction combining PTC heating material with ceramic substrate and protective coatings. This composite structure provides both mechanical strength to withstand vehicle rocking and simplified manufacturing through integrated forming processes, resolving the contradiction between durability and ease of manufacture

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent designs the heating element with built-in mechanical protection and flexible mounting structures that cushion against vibrations and shocks from vehicle operation. This beforehand cushioning prevents structural damage while maintaining a relatively simple overall design that is easy to manufacture

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Loss of energy

If thermal diffusion performance is enhanced through multiple layers, then heat transfer efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidstructural complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent enhances thermal diffusion by adding vertical layering (z-dimension) with multiple functional layers including PTC material, ceramic substrate, and thermal conductive layers. This dimensional approach improves heat transfer efficiency without significantly increasing horizontal footprint or overall device complexity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 provides a heating system with high thermal diffusion performance, improved reliability, and reduced environmental impact, achieving efficient heating and structural integrity in electric vehicles.

Implementation Method 1

a heating element arranged therein

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

first thermal diffusion plate, a ceramic substrate disposed on the first thermal diffusion plate and having a heating element arranged therein, and a second thermal diffusion plate arranged on the ceramic substrate

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

porous radiation fins, which enhance thermal diffusion and surface resistivity

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentUS11535086B2Heating rod, heating module including same, and heating device including same

Publication Date: 2022.12.27 LG INNOTEK CO LTD

AI summary

According to one embodiment of the present invention, a heating rod comprises: a first thermal diffusion plate; a ceramic substrate arranged on the first thermal diffusion plate and having a heating element arranged therein; and a second thermal diffusion plate arranged on the ceramic substrate, wherein the first thermal diffusion plate and the second thermal diffusion plate are respectively stacked in a plurality of layers. Since the first thermal diffusion plate and the second thermal diffusion plate are stacked in the plurality of layers, a heating rod having a high thermal efficiency and being capable of fast heating and a vehicular heating device including the same can be obtained.