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As the Global New Energy Industry Rapidly Develops, Battery Safety Testing Becomes a Core FocusWith the rapid growth of the global new energy industry, particularly in electric vehicles and energy storage, the safety of power batteries has become a key concern. By 2025, as high-energy-density battery technologies such as solid-state batteries and sodium-ion batteries are increasingly applied at scale, the performance requirements for explosion-proof test chambers will be further elevated. How can companies select an explosion-proof test chamber that truly meets both research and production needs in a complex market environment? This article explores the latest industry trends and compares three major international brands—ASC, Espec, and CSZ—while also providing a detailed analysis of the technical breakthroughs and scenario adaptability of China’s top brand, DHT® New Energy Battery Explosion-Proof Test Chamber.
Analysis of the 7 Core Parameters of Explosion-Proof Test Chambers
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Explosion-Proof Rating and Structural Design
By 2025, industry standards will place greater emphasis on the synergy between “active explosion-proof” and “passive protection.” The explosion-proof rating must meet or exceed the requirements of GB/T 3836.1-2021 Ex d IIC T6, and the chamber must feature a double-layer stainless steel structure with an inert gas injection system. DHT® introduces an innovative “honeycomb pressure-relief channel” that improves shockwave dispersion efficiency by 10%, outperforming ASC’s modular pressure-relief valve design.
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Temperature Range and Precision Control
Testing solid-state batteries requires coverage of extreme conditions from -70°C to +180°C. Traditional brands like CSZ (with a range of -60°C to +150°C) are close to their limits. In contrast, DHT® employs multi-stage refrigeration coupling technology to achieve full-range coverage from -70°C to +180°C, with temperature fluctuations of only ±0.15°C—ideal for next-generation battery material development.
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Pressure Control and Response Speed
During thermal runaway, the electrolyte of sodium-ion batteries can cause pressure to surge up to 2 MPa. The test chamber must be capable of millisecond-level pressure relief. ASC uses mechanical pressure relief (response time <50ms), while DHT® utilizes solenoid valve cluster control technology, reducing response time to <20ms, with pressure control accuracy of ±0.5kPa.
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Data Acquisition and AI Early Warning System
By 2025, mainstream equipment must integrate multi-modal sensors (temperature, voltage, deformation, gas composition) and include AI anomaly prediction capabilities. DHT® features the self-developed BatteryGuard 3.0 system, supporting 16-channel synchronous sampling and thermal runaway trend prediction, with an alarm false-positive rate of less than 0.1%, significantly outperforming Espec’s 8-channel system.
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Energy Consumption and Operation & Maintenance Costs
For a 1000L test chamber, ASC’s annual electricity consumption is around 86,000 kWh, while DHT® uses variable-frequency compressors and waste-heat recovery technology to reduce energy consumption by 12% and extend key components’ lifespan by 10%.
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Compatibility and Expansion Capabilities
DHT® offers modular interfaces, enabling seamless integration with mechanical abuse testing devices such as puncture and extrusion tests, and supports over 20 international standards, including UN38.3 and IEC 62660-3. In contrast, CSZ requires additional modules for these functions.
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Safety Certification and Localized Services
In addition to CE and UL certifications, DHT® is also certified by China’s Explosion-Proof Electrical Equipment Certification (CNEX) and the EU ATEX dual certification. With emergency service networks in Yangtze River Delta and Pearl River Delta, DHT® provides a 4-hour response time, addressing the slow after-sales service issues often encountered with imported brands.
Technical Comparison of Four Major Brands and Scenario Adaptability
| Parameters | ASC（US） | Espec（JP） | CSZ（US） | DHT®（CN） |
| Explosion-proof Rating | Ex d IIC T6 | Ex d IIB T5 | Ex d IIC T5 | Ex d IIC T6+ |
| Temperature Range | -70℃~180℃ | -70℃~180℃ | -60℃~150℃ | -70℃~180℃ |
| Pressure Response Speed | <50ms | <80ms | <60ms | <20ms |
| Data Channels | 12 Channels | 8 Channels | 10 Channels | 16 Channels |
| Annual Energy Consumption (1000L) | 86,000 kWh | 92,000 kWh | 88,000 kWh万度 | 58,000 kWh |
| Localized Service Network | 2 Technical Centers | 3 Maintenance Hubs | 1 Regional Office | 12 Service Centers |
| Typical Application Scenarios | Commercial Vehicle Battery Module Testing | Consumer Battery R&D | Energy Storage Battery Validation | High-Nickel/Solid-State Battery Mass Production |
DHT®’s Differentiated Value and Selection Recommendations
For power battery companies in 2025, the following scenario needs should be prioritized:
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High-energy-density battery production lines: Choose DHT®’s 180°C high-temperature mode to simulate extreme conditions for solid-state batteries.
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Overseas companies with compliance requirements: DHT®’s dual-certification system (CNEX + ATEX) covers both the Chinese and European markets.
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Cost reduction and efficiency improvement: DHT®’s energy optimization design reduces the cost of testing per GWh of production capacity by about $150,000.
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Long-cycle research projects: DHT®’s modular design supports future upgrades to 200°C ultra-high temperature testing.
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Compared to imported brands, DHT® demonstrates significant advantages in extreme-condition adaptability, intelligent operations, and total lifecycle cost. According to third-party testing reports (CNAS: LAB-2024-BT001), DHT®’s explosion-proof system successfully suppresses the likelihood of deflagration during thermal runaway tests by 99.97%, the highest in the industry.
Conclusion
As the new energy industry moves toward the TWh era, explosion-proof test chambers have evolved from “basic testing tools” to “core safety barriers.” Companies must adopt a forward-looking technological perspective when choosing equipment that balances both performance breakthroughs and long-term economic viability. Through continuous technological innovation and deeply scenario-based design, DHT® is becoming a strategic partner for top global battery companies. We invite partners worldwide to join us in advancing battery safety technology, ensuring that every technological innovation withstands the most rigorous tests.
Contact our engineering team today to obtain a customized testing solution!