Frontline | Yang Hongxin of SVOLT Energy: Lamination process will be the best solution for mass production of ultra-fast charging and solid-state batteries.
From May 15th to 17th, the 17th Shenzhen International Battery Technology Exchange/Exhibition (CIBF2025) officially opened. At this exhibition, SVOLT Energy Technology Co., Ltd. showcased its full range of products, including short blade batteries, 6C batteries, batteries for both commercial and passenger vehicles, Fengxing batteries, and off-road batteries. Yang Hongxin, the chairman of SVOLT, also shared SVOLT's judgment on the future direction of battery technology and the company's breakthroughs in fast - charging technology.
Yang Hongxin believes that the lamination process will be the best solution for ultra - fast charging technology and the mass production of solid - state batteries. He introduced that ultra - fast charging technology needs to meet requirements such as low internal resistance, low deformation, and high interface fit. Compared with the winding process with R - corners, the lamination process is superior in aspects such as the stress distribution of the electrode group and the morphology of metal deposition.
Moreover, under the lamination process, the metal deposition inside the battery cell is more uniform, while uneven deposition is prone to occur at the R - corners in the winding process. Especially when the solid electrolyte material is brittle and more prone to fracture, the lamination process is the only technical route for the mass production of all - solid - state batteries, and the thermal composite flying lamination technology can accelerate the mass production of all - solid - state batteries.
SVOLT has been deeply involved in the lamination process since its establishment. Compared with the winding process, which has been used in the battery industry for decades and is very mature, the lamination process began to be gradually applied in the power battery industry in 2018, the same year when SVOLT was founded.
Although the battery cells made by the lamination process have better performance, the process is more difficult. Therefore, few enterprises have made large - scale investments in this process. It was not until SVOLT proposed the short blade battery and "fully committed" to the lamination process that this technology began to move from the periphery into the public view.
Of course, the lamination technology is not unified. The most common ones in the industry are Z - lamination and cut - lamination, while SVOLT uses the thermal composite flying lamination technology. This technology can accommodate eight stations for simultaneous lamination. The lamination efficiency of its third - generation production line has reached one piece every 0.125 seconds, and the production efficiency is almost comparable to the conventional winding process in the industry.
In order to develop the thermal composite flying lamination process technology, SVOLT has made a lot of innovations, which not only involve cell design, manufacturing process, and production line algorithms but also require adjustments to raw materials. It is a revolution in the entire production chain.
Nowadays, under the trend of fast - charging batteries and solid - state batteries, more and more enterprises are starting to adopt the lamination route. Whether it is Jiyao Tongxing under Geely or Yinpai Battery under GAC Aion, these companies have begun to use the lamination method to produce batteries.
In addition to the lamination process, Yang Hongxin also demonstrated SVOLT's breakthroughs in fast - charging technology.
He shared a piece of data: More than 60% of EV/PHEV users will fully charge their batteries directly, but the industry generally focuses on the charging time from 10% - 80% SOC (EV) or 30% - 80% SOC (PHEV), ignoring the efficiency at the end (80% - 100% SOC).
Therefore, SVOLT's technical goal is to improve the end - stage fast - charging performance and achieve "true fast charging". He introduced that for SVOLT's 4C fast - charging project, the full - window charging time has been optimized to 15 minutes, and the charging time from 80% - 100% SOC has been shortened to 5 minutes, a 30% improvement compared with competitors.
The 4C fast - charging project uses the lamination process for manufacturing, which has a high charging capacity boundary and supports a higher - rate charging at the end. Moreover, in the thermal management system, this project uses a digital and intelligent dual - temperature control monitoring system to precisely control the temperature in real - time and ensure that the battery is in the best charging state.
In addition, Yang Hongxin also introduced SVOLT's flagship product, the "Second - Generation Dragon Scale Armor" battery. This is currently the world's largest hybrid - extended battery, with a large capacity of 65 kWh, compatible with 800V fast charging, and a cruising range of over 400 kilometers.
This product only takes 12.1 minutes to charge from 20% to 80% SOC, can achieve more than 1600 fast - charging cycles, and can also support 6C ultra - fast charging.
Yang Hongxin introduced the "thermal - electrical separation" technology of the Dragon Scale Armor battery: Through the CTP design, the upper and lower parts of the battery cells are bonded, the exhaust gap and the bottom protection gap are shared, and the thermal runaway ejecta are discharged directionally to eliminate the risk of short - circuit and meet the new national standard in advance.
In addition, the bottom of this product uses an ultra - high - strength steel bottom guard plate + T - shaped double - layer profile protection structure, which can withstand an impact of 1000J, more than six times the strength required by the new national standard. It is reported that the second - generation Dragon Scale Armor battery will be mass - produced on a large scale in mid - June 2025 and will be first installed in high - end MPVs, sedans, and SUVs.