In recent years, with the continuous growth of the number of new energy vehicles, the frequency of new energy vehicle fire accidents has also increased year by year, seriously endangering the safety of drivers' lives and property. The causes of fires in new energy vehicles are caused by many factors. Among them, overcharging, extrusion, collision, water wading and other harsh conditions of the power battery and manufacturing process problems may cause thermal runaway of the battery and cause the new energy vehicle to catch fire or even explode.

In the case of a fire accident in a new energy vehicle, although the flame temperature of the lithium-ion battery is relatively low when it burns, when the battery fire is completely extinguished, the temperature of the battery does not drop to a safe level quickly, and a large amount of toxic gas is produced. Even if it is immersed in water, it will take a long time for its temperature to drop to a safe level, and the battery is also prone to re-ignition, which spreads very quickly.

When a new energy vehicle catches fire, the voltage and temperature of the faulty battery core will rise rapidly and the heat transfer time will be extremely short, causing a large area of thermal runaway of the battery core in a short period of time. If the characteristic parameter changes of a faulty single battery cell can be accurately captured and the driver can be warned, the occurrence of accidents will be reduced.

When an electric vehicle encounters a mechanical collision, the battery is squeezed and collided, or the electric vehicle catches fire, the battery pack shell is crucial to the mechanical protection of the battery pack. Enhance the flame retardant performance of the casing. When the battery thermal runaway occurs, the high flame retardant casing has the function of inhibiting the spread of fire. Improving the sealing performance of the battery has a significant impact on preventing gas leakage and combustion diffusion when the battery pack is immersed in water or thermal runaway. The flame-retardant coating is used on the surface of the shell to enhance the flame resistance of the battery pack shell.

Flame-retardant melamine foam can be installed between the module, battery cell and battery pack shell. When a battery undergoes thermal runaway, melamine foam can effectively block the spread of heat and limit the direction of the fire. It also blocks the chain reaction between individual cells and improves the fire protection performance of the battery. The structure of the battery box can also use high-strength materials, use reinforcing ribs or set up buffer devices, etc., and set up buffer structures to buffer and absorb part of the force of collisions, protect the battery pack from damage, and reduce the risk of short circuits caused by mechanical collisions.

At present, the fireproof materials of new energy vehicle battery packs are mainly laid with fireproof felt materials, such as insulation blankets, mica boards, ultra-fine glass wool, high silica cotton felts, etc. Although fireproof felt can effectively isolate heat diffusion, control the direction of fire, and delay the heat diffusion time of the battery, adding fireproof felt also has problems such as increased mass, which is not conducive to the development of lightweight vehicles, poor heat dissipation performance, and limitations in the design and construction process. Therefore, according to the market demand for safety and lightweight of power battery packs, melamine foam with excellent flame retardancy has become the first choice material for battery protection of new energy vehicles.

SINOYQX provides professional materials and solutions for automobile manufacturing, especially for high standard requirements of new energy batteries for Thermal Insulation, Flame Retardant, and Heat Preservation, based on existing design and production capabilities, through continuous innovation and research and development with its YQX-C6 type from special melamine foam treatment.

SINOYQX New Energy Battery Pack Material Properties

• Permanent flame retardancy ((UL94 V-0, HF-1, B1 rating)
• Excellent thermal insulation (thermal conductivity, 0.035 W/ (m*K))
• Permanent insulation (1000V DC, withstand voltage 3000V DC)
• Wide weather resistance (- 196°C to 200°C , up to 240°C shortly, maintaining stable physical and chemical properties)
•Flexibility (the thinnest can reach 0.3mm)
• Lightweight(8~51KG/M3)
• Eco-friendly (does not contain any halogenated hydrocarbons, flame retardants and/or toxic heavy metals; does not produce toxic and harmful gases when burning in flames) Environmental stability (acid resistance, alkali resistance, antibacterial, mildew resistance) Excellent sound absorption performance (0.95NRC)
• Secondary processing formability (easy to cut, can be back glued or laminated, etc.)

For more information about SINOYQX Melamine Foam, please reach us at [email protected] or voice to us: +86-28-8411-1861.