Ultra-fast Charging Era: How To Address The Thermal Runaway Challenges in Ultra-fast Charging

"Charge for 5 minutes, travel 200 kilometers", the ultra-fast charging technology of new energy vehicles is completely transforming our travel experience. However, when the charging current doubles, the Joule heat generated inside the battery increases exponentially.

In a very short period of time, the massive energy influx causes the cell temperature to easily soar to 70-80°C, or even higher. If this accumulated heat cannot be promptly dissipated, it is highly likely to lead to the failure of the separator, the decomposition of the electrolyte, and ultimately trigger a catastrophic "Thermal runaway".

For automobile manufacturers and battery pack manufacturers, thermal management has evolved from an "auxiliary system" to a "core safety element". The customer's demand is clear： we want fast charging, but we must not sacrifice safety and battery lifespan. Traditional cooling solutions often fall short when facing ultra-fast charging rates of 4C or even above 6C.

Liquid cooling technology has thus become the industry's recognized preferred solution. In the liquid cooling system, the liquid cooling pipes, as the "blood vessels" for the circulation of coolant, the reliability of their material, corrosion resistance, and thermal conductivity directly determine the upper limit of the thermal management system.

304 stainless steel liquid cooling pipes contain 18% chromium and 8% nickel. Their core advantage lies in its self-repairing corrosion resistance. The surface of the pipe can quickly form a dense chromium oxide protective film, which acts as a "hidden armor" to resist the electrochemical erosion of the battery coolant (such as ethylene glycol solution) for a long time, preventing the corrosion and peeling of the pipe wall caused by rust, and ensuring the long-term operation of the system.

China Super Tech Co., Ltd. 304 stainless steel has excellent welding processability. Thanks to its balanced microstructure, our pipe materials have a very small heat affected zone and high weld strength when using TIG or laser welding, effectively avoiding the common intergranular corrosion or false welding risks of traditional pipe materials. This "zero-leakage" connection reliability is precisely the key to coping with the high-pressure environment of ultra-fast charging.

China Super Tech Co., Ltd. 316 stainless steel liquid cooling pipes are a flagship product tailored for high-end safety requirements. We introduced key molybdenum (Mo) element on top of 304 to enhance the pipe's resistance to pitting and gap corrosion.

In the actual operation of new energy vehicles, it is inevitable that condensate water or a small amount of coolant leakage will occur inside the battery pack, forming an oxygen-deficient "gap environment". At the same time, salt fog or industrial pollutants in coastal areas, such as chloride ions, constantly threaten the passivation film on the pipe wall. Super Tech 316 stainless steel can effectively resist these local corrosion attacks, preventing coolant leakage or a decline in thermal management efficiency caused by tiny pits.

Our main products are 316 stainless steel liquid cooling pipes and 304 stainless steel liquid cooling pipes, with specifications ranging from Φ9.5mm to Φ114.3mm, and wall thicknesses of 0.8mm to 3.05mm and various standard and non-standard sizes. Our products are widely used in the thermal management of new energy vehicle batteries, electric drive cooling, and can also extend to energy storage systems, data center liquid cooling and other diversified high-efficiency scenarios.
 

Our company has a large inventory, with complete specifications and materials. For standard products, we promise rapid delivery, significantly shortening your procurement cycle; at the same time, we also provide in-depth customization services. Whether it is special diameters, wall thicknesses, or fixed-length cutting and pipe end forming, they can be processed according to the drawings, flexibly responding to your research and production needs.