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Typical Key Requirements for Dielectric Materials
Dielectric Materials are electrically insulating materials that enable safer and high-power battery systems.
Key Requirements:
- High dielectric strength > 2.8kv
- Good adhesion to a substrate
- Durable
- Applied at a thin film thickness
- Ease of manufacturing
Dielectric MaterialsTested
Four types of dielectric materials were tested in this study:
- PET Film
- Powder Coating
- Sipiol® UV Coating
- LORD® JMC 700K
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Dielectric Protection Application Areas
Dielectric Materials can be applied in the following sections of the EV:
- Battery Cells
- Bus Bars
- Cooling Plates
- Side Plates and Walls
- Battery Lid
Test Methods
- Hipot Test: Determine the breakdown voltage of the dielectric materials. DC mode in air per ASTM D3755, current limit < 0.3mAmp Electrical isolation.
- Adhesion: How well does the coating stick to the aluminum? Lap shear per ASTM D1002. Epoxy structural adhesive
- Effect of Environment: Thermal Shock Cycling: 100C to -40C within 24min for up 120 cycles. High Heat and Humidity: 85C/85RH for up to 3 week.
- Edge Coverage: cross-section image and film thickness analysis. Very sharp edge 0.03mm radius. Sharp edge 0.8mm radius
- Thermal Conductivity: TIM method, ASTM D5470. Aluminum disk coated with a dielectric material. 50kPa pressure
About the Authors...
Eric Dean, Global Business Development Manager
Eric Dean is a global business development manager at Parker Lord with expertise in industries including industrial, automotive, aerospace, defense, consumer electronics, and medical devices. Eric currently leads the Parker Electrification segment, including Parker Lord’s Cooltherm products, thermal interface materials, adhesives, and coatings.
Emmanuel Pitia, PhD, Staff Scientist
Emmanuel Pitia, PhD, is a lead staff scientist at Parker Lord with expertise in product development and application of UV coatings, fire retardant coatings, rubber to substrate adhesives for the automotive and industrial market. Emmanuel currently is working on the development and commercialization of UV coatings for the automotive market.
Paul Wheeler, PhD, Senior Staff Scientist
Paul Wheeler, PhD, is a senior staff scientist in the global product development team based out of Erie, PA. He joined Parker Lord 9 years ago and has focused on developing innovative coatings, adhesives and bonding solutions. He received a BS in Plastics Engineering Technology from Penn State Erie and a PhD in Polymer Science from the University of Southern Mississippi.
Sipiol UV FAQs
Looking for frequently asked questions about Sipiol UV? You've found the right place. Our technical support teams, scientists, and application engineers have developed a comprehensive list of answers to some of the top questions we get asked.
LORD® JMC-700K Protection Coating Technical Data Sheet
Learn more about our Portfolio of Cooltherm applications and which one is ideal for your battery pack design.
Assessing Technologies for Dielectric Protection of Battery System Components - Part 1
In the first of this three-part blog series, we cover the role of dielectric materials in the assembly of high-voltage battery packs and what’s being done to improve the electrical isolation performance of dielectric materials in battery safety with a focus on four types that exist today.
Assessing Technologies for Dielectric Protection of Battery System Components - Part 2
In part two of the series, we walk through the extensive testing process our team completed on a variety of dielectric materials for EV batteries.
Assessing Technologies for Dielectric Protection of Battery System Components - Part 3
In this last part of the series, we examine the factors that should be weighed when selecting a dielectric material for electric vehicle battery applications
Not sure which dielectric coating you need? Talk with one of our experts.
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FAQs
Expand each section below for answers to frequently asked questions on dielectric protection for EV batteries.