I. Rapid Expansion of New Energy, Battery Safety Becomes a Core Mandatory Requirement

In 2026, the new energy industry continues to maintain a high growth trajectory. In the first quarter, domestic new energy vehicle production and sales both approached 2.97 million units, with vehicle exports surging 116.3% year-on-year, making overseas markets a core growth driver for the industry. Industry estimates project that 2026 global power battery demand will exceed 1,678 GWh, with energy capacity per vehicle continuing to rise and high-energy-density batteries becoming widely adopted.

Behind this industry expansion, the safety hazard of power battery thermal runaway has become increasingly prominent. As cathode material activity increases and cell capacity expands, spontaneous combustion incidents caused by short circuits, nail penetration, overcharging, and over-discharging have become frequent. Safety compliance and thermal runaway mitigation solutions have become core topics for R&D立项 in power battery and energy storage system manufacturers.

There is clear industry consensus: to achieve the goal of "zero thermal runaway" in batteries, a high-performance, ultra-thin, and highly stable cell thermal insulation and flame-retardant material is an indispensable core foundation of the entire protection system. Traditional ceramic fiber and ordinary aerogel insulation products generally have shortcomings such as poor compression rebound, significant high-temperature shrinkage, thickness that occupies battery pack space, and susceptibility to powdering and failure over long-term use, making them unable to meet the dual demands of lightweighting and high safety in next-generation high-density energy storage and power batteries. Against this backdrop, WH Thermal Technology has developed the WHMF-46T Nano Insulation Sheet specifically for the new energy sector, achieving a technological breakthrough and becoming the preferred solution for thermal insulation and flame retardancy in power batteries and energy storage PACK systems.

II. Nano-Porous Composite Structure, Triple Blocking of Heat Transfer Paths

WHMF-46T nano insulation sheet is independently developed by WH Thermal Technology, drawing on over a decade of R&D experience in nano insulation materials. It uses 7~12nm fumed silica powder as the core base material, compounded with high-temperature resistant inorganic fibers, SiC/Zr₂O infrared opacifiers, and specialized functional additives. Through precise proportioning and high-temperature integrated composite forming, the outer layer is fully sealed with high-temperature resistant fiberglass fabric, internally forming a 90% high-porosity dense nano-microporous structure that simultaneously blocks heat transfer through three paths: conduction, convection, and radiation.

1. Blocking solid heat conduction: Nano-scale SiO₂ powder significantly elongates the solid heat transfer path, greatly reducing solid-phase thermal conductivity;

2. Suppressing gas convective heat transfer: The internal pore size is smaller than the mean free path of air molecules, preventing air molecules from freely colliding and convecting, cutting off convective heat transfer at the source;

3. Reflecting high-temperature infrared radiation: Built-in inorganic opacifiers efficiently reflect high-temperature infrared radiation, suppressing radiative heat transfer under high-temperature conditions.

The entire manufacturing process is independently controllable, with standardized mass production throughout. The finished product thickness range covers 0.8mm~7mm, with thickness tolerance controlled within ±0.15mm. It can be custom-cut according to cell gaps and module structures, perfectly fitting the confined installation spaces inside batteries.

III. Multiple Indicators Significantly Superior to Traditional Aerogel

Based on testing by the National Refractory Materials Testing Center and GTS third-party authoritative testing, WHMF-46T nano insulation sheet outperforms industry-standard ceramic fiber aerogel across all parameters, while also meeting all series of automotive and energy storage national standards and EU environmental regulations:

1. Basic Thermal Insulation and High-Temperature Resistance Performance

· Fire rating Class A non-combustible, UL94-V0 flame retardancy standard, with a long-term maximum temperature resistance of 1000℃;

· At 800℃ high-temperature conditions, thermal conductivity is only 0.032 W/m·K, with insulation capacity 3~4 times that of traditional ceramic fiber;

· Excellent long-term thermal stability at high temperatures, with extremely low permanent linear shrinkage after 800℃ for 24 hours, and no aging or deformation over long-term use.

2. Mechanical and Insulation Safety Performance

The comparison shows that WH nano insulation sheet has a significant advantage in compression rebound performance. Under long-term vibration and compression in battery modules, it does not easily collapse, and its insulation performance remains durable without degradation. Traditional aerogel, with its large compression deformation, poses a risk of insulation failure over long-term use.

3. Environmental Compliance Certifications

The product fully complies with RoHS ten restricted substance requirements and GB/T 30512 automotive prohibited substance specifications, containing no halogens and no toxic volatile compounds, making it suitable for new energy vehicle and energy storage battery exports to domestic and international projects. It also has excellent corrosion resistance, with stable performance in humid and alternating hot-cold environments, greatly extending the full-lifecycle protection capability of battery packs.

4. Cost Advantage

Under the same insulation, fire resistance, and insulation performance conditions, the comprehensive procurement cost of WHMF-46T nano insulation sheet is lower than that of high-end imported aerogel materials, balancing safety, lightweighting, and cost reduction needs, helping battery manufacturers balance product competitiveness and production costs.

IV. Diverse Application Scenarios, Covering Power Battery + Energy Storage Full-Scenario

WHMF-46T ultra-thin nano insulation sheet is specifically designed for thermal management of new energy batteries, providing an integrated solution for cell insulation, module cushioning, and enclosure thermal insulation:

1. Cell Gap Insulation and Flame Retardancy: Placed between individual cells, it forms an independent thermal barrier. When a single cell undergoes thermal runaway, it blocks the spread of high temperatures to adjacent cells, preventing cascading combustion and explosion. In nail penetration and thermal abuse tests, it rapidly encapsulates high-temperature hot spots, significantly delaying thermal diffusion and providing sufficient time for personnel evacuation and firefighting intervention.

2. Module and Enclosure Cushioning and Insulation: Filling the gaps between modules and the battery pack enclosure, it provides both thermal insulation and shock-absorbing cushioning, mitigating damage to cell structures from vehicle vibration while blocking external high temperatures from conducting into the battery.

3. External Insulation Layer for Battery Enclosures: Applied to the exterior of energy storage containers and residential battery cabinets, it insulates against summer sun exposure high temperatures and winter cold, stabilizing the battery operating temperature range, reducing air conditioning temperature control energy consumption, and improving battery charge-discharge consistency and cycle life.

The product has been mass-supplied to leading power battery and energy storage companies such as CATL, BYD, Huawei Digital Power, and Sungrow, covering passenger vehicles, commercial vehicles, commercial & industrial energy storage, and residential energy storage.

V. Large-Scale Production Capacity and Full-Chain Services, Ensuring Stable Delivery for Leading Projects

WH Thermal Technology (Shanghai) Co., Ltd., established in 2013, is a high-tech and specialized & sophisticated enterprise integrating R&D, production, and custom solutions for nano insulation materials, with mature and stable large-scale supply capabilities:

1. Dual Production Base Layout: Two modern production bases in Nantong, Jiangsu and Jingmen, Hubei, with a total factory area of over 30,000 ㎡, equipped with 16 automated professional production lines, producing millions of square meters of nano insulation materials annually, capable of handling large-volume annual stable orders from battery manufacturers;

2. Comprehensive Qualification and Technology Barriers: Holding 56 independent intellectual property rights, certified with ISO9001/14001/45001 three-system, intellectual property management system, and EU CE certifications. Product test reports are accredited by CNAS and SGS. A dedicated R&D center in Kunshan is equipped with full sets of thermal runaway, fire resistance, and insulation testing equipment, enabling joint iterative material testing with automotive and energy storage companies;

3. Global Service Network: Having served more than 5,000 domestic and international companies, with products exported to over 20 countries, covering new energy vehicles, energy storage, aerospace, metallurgical industry, petrochemical, power, high-speed rail, and many other fields;

4. One-Stop Technical Support: Providing full-process services including free condition assessment, thermal management insulation solution design, sample testing, custom die-cutting processing, and on-site technical guidance, with rapid response to various technical needs during customer R&D and mass production phases.

VI. Industry Outlook: Nano Ultra-Thin Insulation Materials Will Become Standard for Battery Safety

Driven by the dual carbon policy, new energy storage safety regulations, and surging new energy vehicle exports, battery thermal runaway protection standards are continuously tightening. Lightweight, highly insulating, and long-life nano insulation sheets will gradually replace traditional bulky insulation materials and become the standard configuration for power battery and energy storage PACK systems.

WH Thermal Technology will continue to deepen the iteration of nano-microporous insulation technology, optimizing the performance of the WHMF series ultra-thin insulation sheets, while advancing the development of next-generation insulation materials with even lower thickness, higher temperature resistance, and better cost-effectiveness. Leveraging large-scale production capacity, mature implementation cases, and full-industry custom service capabilities, we will provide reliable and efficient thermal safety protection solutions for global new energy companies, supporting the industry's goal of safer and more energy-efficient development.