As the global energy landscape continues to shift toward renewables, energy storage systems have emerged as essential components in grid stability, frequency regulation, and microgrid deployment. At the heart of these systems lies the battery cell—its safety being a key factor in unlocking broader adoption across the industry. On August 1, 2025, China officially implemented GB 44240, the nation’s first mandatory safety standard for energy storage batteries, marking a new chapter in safety regulation.
In this context, Envision Power has showcased its robust capabilities by voluntarily initiating a set of six extreme safety tests that go well beyond global industry standards. These tests aim to redefine the safety boundary of energy storage battery cells and reinforce Envision’s long-standing commitment to safety innovation.
Pushing the Limits: Six Extreme Cell Safety Tests
In the presence of leading third-party certifiers—including TÜV Rheinland, CGC (China General Certification), and CATARC (China Automotive Technology and Research Center)—Envision Power carried out six high-intensity extreme tests on its independently developed LFP (Lithium Iron Phosphate) storage cells:
- Drop Test: Cells were dropped from a height of 5 meters, significantly surpassing standard requirements of 1.2–2 meters.
- High-Temperature External Short Circuit: Envision raised the instantaneous current to five times the GB 44240 requirement, pushing the cell’s materials and structure to their limits.
- Overcharge Test: The duration of overcharging was the longest among all current standards, simulating prolonged abuse scenarios.
- Nail Penetration: Envision voluntarily upgraded the test from GB’s “shallow penetration” to full deep penetration to intensify internal damage.
- Fire/Projectile Test: Simulated open flame exposure confirmed no explosion or projectiles, minimizing secondary hazards.
- Thermal Runaway Test: Validated safety under uncontrolled internal heating, ensuring no cascading failures.
Throughout these tests, the cells did not explode or ignite, demonstrating a level of performance far beyond regulatory expectations and redefining what “safety” means in energy storage.
First to Pass GB 44240: A Historic Milestone
GB 44240 sets stringent requirements for nail penetration, high-temperature short circuit, and overcharge—among the toughest globally.
Envision Power became the first company in China to be certified under GB 44240, completing the full testing and certification process in less than a month. This rapid achievement reflects not only its advanced R&D capabilities but also its manufacturing and safety validation efficiencies.
Most notably, Envision’s voluntary enhancement of the nail penetration test into full-through piercing, while still maintaining stable structure and performance, demonstrates that its products exceed even UL 9540A and UL 1973 benchmarks—positioning Envision among global safety leaders.
50GWh Delivered with Zero Incidents: A Proven Safety Record
What gives Envision Power the confidence to go beyond the standard? The answer lies in its impeccable safety record.
To date, Envision has delivered over 50GWh of energy storage cells to more than 300 projects across 20 countries, maintaining a record of:
- 0 fires
- 0 pressure valve activations
- 0 major safety incidents
This outstanding performance is the result of a comprehensive full-chain safety system:
- Design-phase safety: Multi-layer protection architecture and advanced thermal management.
- Precision manufacturing: Intelligent production lines and full traceability throughout the product lifecycle.
- Operational monitoring: Real-time, digitalized monitoring and predictive maintenance systems to identify and neutralize risks proactively.
Certified Globally: Meeting the Toughest Standards Worldwide
With its global vision, Envision ensures that its cells meet both domestic and international standards. The company’s storage cells have passed over 200 safety verifications, covering markets such as the US, Japan, Europe, Korea, and China.
Envision has secured certifications from authorities such as:
- UL 9540A
- UL 1973
- NFPA 268
- IEC 62619
In particular, flame power levels during fire testing exceeded 2x the minimum NFPA 268 requirement for North American standards.
Envision also owns witness lab qualifications from TÜV Rheinland, CGC, and CATARC, making it capable of conducting high-level tests in-house. This greatly shortens certification cycles and enhances product safety validation efficiency.
Proactive Safety Mindset: Leading, Not Following
What sets Envision apart from many peers is its proactive approach to safety. Rather than simply meeting regulations, the company takes it further—anticipating future risks and building safety into every stage of design, testing, and manufacturing.
The recent six-test verification campaign was not mandated, but voluntarily conducted. This philosophy of “testing beyond the limits” reflects Envision’s sense of corporate responsibility and global leadership in energy storage safety.
Conclusion: Safety is the Bottom Line of Energy Storage
As energy storage systems become more critical to the power infrastructure of the future, safety is not optional—it’s fundamental.
Envision Power has not only passed the world’s strictest safety standards but has also redefined them. Through its “zero-incident” track record, rigorous testing, and global certifications, Envision stands as a beacon of reliability in the rapidly evolving energy storage landscape.
Moving forward, as new challenges and higher standards emerge, Envision will continue to lead by example—setting new safety benchmarks and ensuring that energy storage remains a trusted pillar of global decarbonization.
