Dongguan Yizhan Electronics conducted a nail penetration test. They discovered hidden risks in non-certified battery packs！

Lithium batteries are becoming the standard power source for mobility equipment, industrial devices, electric bicycles, commercial vehicles, home energy storage and smart machines. While the global demand continues to rise, one critical problem remains at the center of industry concerns—battery safety. The growing number of fire incidents, explosions and overheating accidents has raised significant attention across the market.

Dongguan Yizhan Electronics Technology Co., Ltd. recently did a nail penetration test in its R&D lab. The goal was to mimic an extremely dangerous situation: internal cell damage from piercing or collision.

Unexpectedly, the battery used in the test exploded upon penetration, releasing smoke, sparks and flame. The researchers designed the test to push the limits of the cell. The explosive result showed why safety-certified batteries are important. It also highlighted the hidden danger of uncertified battery packs in the market.

The Nail Penetration Test and What Happened

The nail penetration test is widely considered one of the most severe destructive evaluations in the battery industry. The test pushes a sharp metal nail through the cell.

This directly disrupts the internal structure. It causes short circuits and quick chemical reactions. The objective is simple: to understand whether the cell can remain safe under extreme damage conditions.

During the experiment, Dongguan Yizhan Electronics observed that the test battery immediately entered thermal runaway once someone penetrated the electrode layers. Within seconds, the cell began to smoke, ignite and explode. The engineering team controlled the test environment meticulously. However, the reaction showed the same failure mechanism seen in real battery fires around the world.

This is not an isolated event. Many explosive or burning batteries on the market come from low-cost or uncertified suppliers. These products may look alike, but they do not have good design, internal protection, safety testing, or quality materials.

Battery Explosions Are Not Accidents—They Are Engineering Failures

The root causes of battery fires are often found in the manufacturing process itself. Using poor materials, cutting quality control to save money, and leaving out important safety parts greatly increases risk.

Typical causes of battery explosions include:

Using unqualified, recycled or mixed-grade cells

Poor electrode separators or internal contamination

Lack of BMS safety functions

Weak internal structure and welding quality

Incomplete thermal management

No short-circuit or over-charge protections

Lack of international certification and testing

In short, batteries do not explode by coincidence. They explode because engineers never designed them to withstand failure.

Why Battery Certification Is Now a Global Requirement

Certification is the most reliable way to evaluate battery safety. A certified battery has gone through the strictest test standards in the world, including extreme destructive testing. Internationally recognized certifications include:

UL Certification (U.S. safety standard for packs and cells)

EN Certification (European safety standard for mobility and electronics)

PSE Certification (Japan electrical product safety regulation)

KC Certification (Korea electrical and communication safety system)

These are not just labels. They prove that a battery has survived severe tests including:

• Nail penetration
• Short circuit
• High temperature exposure
• Vibration
• Compression pressure
• Drop impact
• Over-charge/over-discharge
• Thermal abuse

A battery that fails these standards is not suitable for consumer use. Only safe, certified and properly manufactured batteries should enter the market.

The Market Risk: Non-Certified Batteries Still Exist Everywhere

Many countries have mandatory certification for lithium batteries. However, non-certified batteries still fill the market.

This is especially true for low-cost electric bicycles, mobility vehicles, scooters, toy vehicles, and consumer devices. Manufacturers who avoid certification to reduce costs cause many accidents. The result is clear: every day, manufacturers install thousands of low-quality battery packs in vehicles and devices. These packs can overheat or catch fire.

The nail penetration test by Dongguan Yizhan Electronics revealed something important. A battery is not reliable without international certification.

Dongguan Yizhan Electronics: Safety Engineering and Manufacturing

Dongguan Yizhan Electronics Technology Co., Ltd. is a Chinese lithium battery manufacturer. The company focuses on safe battery production and customized energy solutions. Our batteries undergo rigorous testing and have obtained certifications from various countries, such as US UL, EU EN, Korean KC, and Japanese PSE.

We provide OEM and ODM services for the following industries:

Electric Bicycles

Golf Cart Batteries

AGVs and Industrial Equipment

Marine and Mobile Equipment

Medical Devices

Ensuringe reliable performance, every battery undergoes:

• Strict cell screening
• Internal structural reinforcement
• Laser welding processes
• Smart BMS development
• Protective enclosure design
• Environmental stress testing
• Final reliability inspection

From engineering to final delivery, the entire manufacturing cycle follows well-defined quality and safety procedures.

Why Certified Batteries Should Be the Only Choice

When purchasing batteries, buyers often compare voltage, capacity, price and size. But people frequently ignore the most important specification—whether the battery is certified. UL, EN, PSE and KCC certifications are more than compliance standards. They are safety guarantees.

Choosing a certified battery protects:

• Consumers and end-users
• Manufacturers and brands
• Vehicles and devices
• Homes and workplaces
• Entire supply chains

A certified battery ensures stability not only in normal operation, but also during accidents or abnormal events. As the global industry evolves, certification will become the minimum requirement—not an optional feature.

A Message from Dongguan Yizhan Electronics

Battery safety is not only about following rules. Also about protecting lives, property, and the future of energy technology. The nail penetration explosion during the test reminded us that batteries need careful design and strict safety standards.

As Dongguan Yizhan Electronics continues to develop advanced lithium battery solutions, we will keep investing in:

• International certification
• Mechanical and electrical safety design
• Advanced manufacturing technology
• Quality inspection and reliability testing
• High-performance BMS safety architecture

The future of global electrification depends on safe, certified and trusted batteries. And we believe that only manufacturers with responsibility and technical capability will lead the industry forward.