XFC ultra-fast charging battery mass production Juwan Jiyan racing "Third Curve"

"From the perspective of the development curve of power batteries , there are three curves that have been experienced according to the end market demand, namely the energy density curve, the low-cost curve of lithium iron phosphate and the ultra-fast charging curve."

Dr. Pei Feng, President of Juwan Technology Research, believes that as power batteries have basically completed the upgrade in the dimensions of the first two curves, the current market demand has changed from 'endurance is king' to a competition of energy replenishment efficiency, and the demand for ultra-fast charging batteries Large-scale mass production capability is an important indicator for achieving competitive advantage in the third curve. Depending on the difference in charging speed, batteries that can be charged to 80% in less than 10 minutes can be further called ultra-fast charging batteries.

As one of the first domestic companies to enter and deeply develop in the field of XFC (eXtreme Fast Charing) ultra-fast charging technology, Juwan Jiyan's ultra-fast charging power battery professional factory has recently been completed and put into production at the Nansha headquarters base in Guangzhou. When fully completed, the total production capacity will be 8GWh per year. , currently 4GWh has been put into use.

Since entering 2023, the sales growth of pure electric vehicles has slowed down. The biggest obstacle currently is the low efficiency of energy replenishment. On the power battery side, fast charging technology is an inevitable choice to meet the needs of the end market and build differentiated competition barriers.

Juwan Technology Research has seized the third curve development opportunity by taking the lead in the "stuck" fast-charging battery track, and has provided strong support for the future development of the company itself by promoting progress in multiple dimensions such as product mass production, customer expansion, and ecological construction. At the same time, it will promote the further release of my country's fast-charging battery production capacity and "leap forward" to the era of large-scale mass production of fast-charging power batteries.

Charging is as fast as refueling

Looking at the overall development of the power battery industry, energy density, cycle life, safety, manufacturing costs, etc. are all technical competition dimensions that the industry pays close attention to. Nowadays, against the background of breakthroughs in battery energy density and manufacturing costs, safety and charging speed have gradually become the core and pain points of power battery upgrades.

Based on this, fast charging has become a technical scenario for battery companies to increase their layout. Unlike other leading companies, Juwan Technology Research has been accumulating ultra-fast charging technology since its establishment in 2014, rather than treating fast charging as one of its multi-scenario strategic layouts for subsequent development.

Dr. Pei Feng said that Juwan Technology's power battery layout has two cores: charging fast enough and the battery being light and small enough. Among them, in terms of being fast enough, it is necessary to "make charging as fast as refueling without changing the user's habits."

Juwan Technology will release and start mass production of ultra-fast charging batteries in 2021. Compared with the international plan for XFC technology to achieve 10 minutes by 2025, Juwan Jiyan's ultra-fast charging battery has already achieved 7.5 minutes in 2022, leading the world by two or three years.

Technology maturity has always been an important dimension for power battery mass production. Juwan Technology's ultra-fast charging battery integrates technological achievements in multiple fields such as materials, electrochemistry, structure and control, breaking through the five dimensions of battery performance and laying the foundation for battery mass production.

In terms of charging time, the ultra-fast charging battery achieves a 6C ultra-fast charging rate. Its core product is installed in the GAC Aian AI ON V PLUS model and has set a world record certification body (charging in 5 minutes, driving range 207 kilometers). World Record Certification for "Fastest Electric Vehicle Charging Technology" issued by WRCA).

At the event site of the commissioning ceremony, Juwan Technology conducted an ultra-fast charging demonstration: under 480kw charging power, the Juwan ultra-fast charging power battery capacity increased from 32% to 83%, and the charging time was 4 minutes and 46 seconds.

In terms of energy density, the ultra-fast charging battery is based on the current high-endurance ternary solution, and the battery energy density continues to increase;

In terms of cycle life, the ultra-fast charging battery currently has a battery life of 2,000 times and supports a million kilometers of battery life;

In terms of cost, the cost of ultra-fast charging batteries is only 5%-8% higher than that of ordinary ternary batteries. When compared to standard fuel vehicles, it is only the same price difference as a manual transmission to an automatic transmission.

Safety is the core issue of fast-charging batteries that the industry is concerned about. The ultra-fast charging battery adopts an advanced thermal runaway management system to ensure high safety. It can prevent the battery pack from catching fire within 48 hours after thermal runaway, far exceeding the basic standard of not catching fire within 5 minutes required by the country.

The first ultra-fast charging battery factory

As the demand for fast-charging production capacity in the downstream market is gradually released, and many mainstream battery companies have launched fast-charging battery solutions, large-scale mass production has become an important dimension for fast-charging battery companies to seize market opportunities. This puts forward more stringent requirements on the manufacturing process and mass production capabilities of battery companies.

Dr. Pei Feng said that Juwan Giyan’s ultra-fast charging power battery professional factory is the world’s first professional factory for large-scale production and manufacturing of advanced ultra-fast (10-15 minutes) or even extremely fast (5-10 minutes, XFC) charging power batteries. The factory has leading manufacturing level and technical capabilities, and many manufacturing process technologies are industry firsts.

The commissioning of the factory marks that Juwan Technology Research has the dual capabilities of ultra-fast charging battery technology research and development and mass production manufacturing, further promoting the release of high-end and high-quality power battery production capacity.

It is reported that Juwan Jiyan's ultra-fast charging power battery professional factory has formulated special process requirements based on the characteristics and development requirements of ultra-fast charging battery products, and then develops equipment based on special process parameters to ensure the high precision and reliability of equipment in each process. The entire factory has the five characteristics of "professionalism, precision, specialness, innovation and strictness", and has set consistent high standards for the ultra-fast charging XFC power battery manufacturing process.

1. The injection and formation process of special functional electrolyte enables high-rate continuous charging

Increase the wettability of the electrode /electrolyte interface and reduce the activation energy barrier for ion transmission, so that the battery core can be continuously charged at a high rate and maintain an ultra-long cycle life.

2. High-precision raw material mixing process/homogenization process ensures excellent electrochemical and thermodynamic properties of electrode sheets

The multi-component high-precision feeding system ensures accurate supercharging electrode formula. Combined with the raw material premixing system and high-speed homogenization system, the prepared electrode sheets have excellent electrochemical and thermodynamic properties, ensuring that the battery core can be continuously charged at high rates and Maintain cycle life and energy density.

3. Specially made ultra-wide tab welding, effectively reducing resistance and temperature rise during extremely fast charging

Using laser welding to replace the traditional ultrasonic welding process , the welding strength is increased by about 20%, and rapid and large-scale electron transmission is achieved, effectively reducing resistance and temperature rise during extremely fast charging, and improving reliability and safety.

4. Multi-layer coating/roller pressing innovative process to achieve high energy density, long life, low cost and extremely fast charging

In important process links such as coating and rolling that affect the fast charging performance of battery cells, the manufacturing accuracy has reached the industry-leading level. Multi-layer coating technology combined with optimized electrode material systems can achieve extremely fast charging of batteries under the conditions of high energy density, long life and low cost.

5. Strict humidity/cleanliness to ensure the consistency and ultra-high safety of supercharged battery products

Strict environmental humidity and cleanliness control meet the stability requirements of sensitive raw materials for the supercharger core system and ensure the product quality of the ultra-fast charging cells prepared.

Ultra-fast charging will become standard

As the new energy vehicle market and the power battery market are both entering the fast lane, the commissioning of a professional factory for ultra-fast charging power batteries will accelerate the process of loading fast-charging batteries into vehicles.

"Based on current judgment, the penetration rate of new energy vehicles will be about 16% by 2025, and the penetration rate will reach 68% by 2030. This also means that ultra-fast charging will be a standard feature of new energy vehicles." Dr. Pei Feng He said in the interview and introduced the downstream market expansion of Juwan Technology Research, covering pure electric, hybrid, heavy truck, MPV and other fields.