Materials / Electronic Materials

Pouch Battery Materials

Taper Processed Metals for Tab Leads and Acrylic Foam for EV Batteries

Pouch batteries offer low weight and greater latitude in form factors compared to square and cylindrical batteries. For these reasons, they are used widely in EV and mobile device applications. With our proprietary technologies and processing capabilities, we handle taper processed metals for tab leads and acrylic foam for EV batteries, and offer material development and processing solutions to meet customer requirements.

Product List

Product List

Acrylic Foam Series for EV Batteries

Fire Extinguishing Acrylic Foam

Construction

Applications

  • Inside battery pack and module for EV
  • Parts with risk of ignition
  • Due to the soft sheet, this material can be attached to various locations

Characteristics

Item Units Developed products
Thickness mm 1.8
Density g/cm3 0.73

Fire Extinguishing Mechanism

Reacts to the heat generated from the fire and releases an extinguishing agent to extinguish the fire.

Fire extinguishing performance test with gas torch

Fireproof + Thermal Insulation Acrylic Foam

Construction

Applications

  • Between the cells of EV batteries
  • Applications requiring fireproof and thermal insulation

Characteristics

  • 1. Adds fireproof and thermal Insulation to conventional flame retardant foam.
  • 2. Even if you apply a gas torch to the product, the fire will not penetrate and break through the product.
  • 3. Due to its High Thermal insulation, the unheated surface stays below 300℃ even when heated to 800℃. (Within 300 seconds)
  • 4. Cushion foam made from acrylic material with high shock absorption.

Insulation test with a total thickness of about 3.5 mm

Temperature measurement surface Elapsed time (sec)
30 60 90 120 150 180 210 240 270 300
Fire side(℃) 687 800 802 803 804 811 812 811 812 812
Opposite side(℃) 77 144 203 233 259 263 253 259 268 283
Thermal Insulation effect(℃) -610 -656 -599 -570 -545 -548 -559 -552 -544 -529

High Recovery Acrylic Foam (Compression Pads)

Construction

Applications

Typical EV battery module The cells of batteries expand and contract repeatedly due to charging and discharging. Iwatani stress relaxation sheets relieve stresses in cells.

Characteristics

Item Units ISR-ACF-HR ISR-ACF-HR2
Thickness mm 0.5 to 3.0
Density g/cm3 0.3 to 0.35
Adsorption force
on SUS		 N/25 mm Surface 0.87 0.22
PET separator surface N/25 mm 2.00 1.72
Compression set
70% compression × 70°C × 22 hrs		 % 4.03 2.79
Long-term compression set
70% compression × 55°C × 50%RH × 1,000 hrs		 % 20.76 13.42

Fire-Resistant Acrylic Foam

Construction

Applications

電池パック内で難燃性が求められる用途において 効果を発揮します。

Characteristics

Item Units ISR-ACF-FR
Thickness mm 1.0 to 3.0
Density g/cm3 0.35
Adsorption force
on SUS		 Surface N/25 mm 0.03
PET separator surface N/25 mm 0.85
Compression set
50% compression × normal temperature × 72 hrs		 % 35.02
Compression set
50% compression × 70°C temperature × 22 hrs		 % 45.96
Surface resistivity Ω 1011 <
Thermal conductivity Thickness direction W/m·K 0.121
Within the surface plane W/m·K 0.249
UL94 V-0 test - Pass

Thin Film Heat Dissipating Sheet

Taper Processed Metals for Tab Leads

Products available Applications Characteristics
Tapered aluminum Tab lead for cathode The metal foil is tapered to improve tab film sealing characteristics. We can also tailor shapes to meet customer requirements.
Tapered copper Tab lead for anode

Please inquire for more information.

Electronic Materials Department

TEL81-3-5405-5797

Contact Form

Services / Products

Functional Plastics Products Top

Resources & Advanced Materials Top

Metals Top

Electronic Materials Top

  1. HOME
  2. Materials
  3. Electronic Materials
  4. Pouch Battery Materials