Ultra-fast charging and battery swapping are rapidly gaining momentum as automakers race to dominate the energy-replenishment arena.

Besides range and safety, the biggest concern for users of pure electric vehicles is the slow charging process—this is why many have opted for plug-in hybrid and range-extended models. To address this pain point, new-energy vehicle companies have set their ultimate goal to make refueling pure electric cars as convenient as filling up gasoline-powered vehicles, thereby completely eliminating users' anxiety about the slow charging times of EVs.

A few days ago, XPeng Motors unveiled the S4 super-fast charging station, which, when paired with an 800V high-voltage platform, can deliver a peak power output of up to 480kW. This allows users to gain an impressive range of 210km (under CLTC conditions) after just 5 minutes of charging. The introduction of this technology is specifically designed to address the slow charging issue plaguing pure electric vehicles, helping users alleviate their anxiety about long wait times.
In addition to XPeng, BYD, BAIC Arcfox, Zeekr, and Aion have all officially announced their adoption of 800V high-voltage technology. Meanwhile, NIO and Li Auto’s next-generation pure-electric vehicles will also leverage the 800V high-voltage EV platform. Coupled with the highly anticipated battery-swapping technology, a fierce competition among new-energy vehicle companies over "energy replenishment" has already begun in full swing.

Layout 800V high-voltage fast charging addresses charging wait anxiety.

According to the latest data from the China Association of Automobile Manufacturers, new-energy vehicle sales from January to July 2022 reached 3.194 million units, representing a year-on-year increase of 1.2 times. Meanwhile, NEVs captured 22.1% of the market share. However, for new-energy vehicles to secure an even larger slice of the market, they must overcome several key consumer pain points—among which fast and convenient charging remains a significant challenge. While the market penetration rate of NEVs continues to rise steadily, the expansion of supporting charging infrastructure has not kept pace with the rapid growth of electric vehicles. Data shows that in 2020, the ratio of NEVs to charging piles was 2.93:1, but by 2021, this ratio had tightened to 3:1—meaning roughly one charging pile now serves about three vehicles. As a result, in many cities, long queues for charging remain a common sight.
The vehicle-to-charger ratio is too low, a problem that will be difficult to solve in the short term. That’s why Li Auto’s CEO confidently addressed the skepticism surrounding range-extender technology earlier—asserting that, over the next five years, range extenders will remain the optimal solution for new-energy vehicles. After all, if the number of charging infrastructure facilities can’t keep up, the only viable approach is to compress charging time. Currently, breakthroughs in new-energy vehicle battery technology are primarily taking two paths: one focuses on extending driving range, while the other centers on high-voltage fast-charging technology. Due to the voltage limitations of silicon-based IGBT power components, most existing electric vehicle charging systems currently operate at 400V. However, if automakers aim to further reduce charging times, they’ll need to elevate the voltage platform—hence we’re seeing more and more car companies rolling out 800V high-voltage fast-charging solutions.
From a physics perspective, to achieve faster charging, we need to increase the charging power. And boosting charging power can be done either by raising the voltage or by increasing the current. If we opt for higher current, it would require thicker transmission cables, which in turn leads to greater energy losses due to heat generation during transmission—clearly not the most ideal choice. Therefore, increasing the voltage emerges as the optimal solution. By elevating the voltage platform from 400V to 800V—or even higher—we can scale up the high-voltage system, enabling ultra-fast charging capabilities exceeding 350kW. When the current remains constant, the charging power doubles as the system voltage increases, significantly cutting down the charging time. This is precisely how the 800V high-voltage ultra-charging technology enhances charging efficiency. Meanwhile, at the same charging power level, the high-voltage wiring harness in an 800V ultra-charging setup becomes smaller and lighter, naturally reducing costs. Additionally, this design minimizes energy losses and eases thermal management challenges, ultimately leading to a more cost-effective overall battery solution. In essence, the 800V high-voltage ultra-charging system addresses two major pain points: first, it dramatically boosts charging performance, drastically shortening the time required to replenish the battery; and second, at equivalent energy levels, it improves system efficiency, thereby extending the vehicle's driving range.

Take Porsche Taycan's (configuration | inquiry) 800V high-voltage technology as an example—this system is centered around a high-voltage battery pack, and it also integrates a range of components, including high-voltage wiring harnesses, a high-voltage heater, a power converter, and even a high-voltage booster. The system can directly supply the drivetrain with 800V, enabling higher power output compared to the more common 400V systems, thanks to lower current levels. And because of this reduced current, heat generation is minimized, allowing the Taycan to utilize thinner high-voltage cables—resulting in a lighter overall vehicle weight.
Additionally, this 800V high-voltage electrical system gives the vehicle a significant advantage in terms of charging—under DC fast-charging mode, it can add 100 kilometers of range in just 5 minutes. When paired with a 270kW fast-charging interface, the Taycan’s battery can be charged from 5% to 80% in as little as 22.5 minutes. While this power output isn’t particularly high, it already represented the cutting edge of charging technology back in 2019, when Tesla’s V3 Supercharger stations were just beginning to debut. Recognizing this emerging trend, automakers are now actively investing in 800V high-voltage charging infrastructure. In fact, 2022 was dubbed the "year of breakthrough" for 800V high-voltage charging technology, with companies like XPeng, BYD, Great Wall, NIO, and Avatr all stepping up their efforts to adopt and integrate this advanced solution into their vehicles.
Among them, XPeng Motors recently launched its 1,000th self-operated charging station, which is also the first site nationwide equipped with the latest-generation ultra-fast S4 charging piles. Meanwhile, the upcoming XPeng G9 will become China’s first mass-produced vehicle based on an 800V high-voltage silicon carbide platform—and currently boasts the fastest charging capability among mass-produced pure electric cars. In 800V high-voltage fast-charging mode, it can achieve a range of over 200 kilometers after just 5 minutes of charging. Additionally, GAC Aion’s AION V Plus is the first model to feature the brand-new A480 supercharging pile, enabling 800V high-voltage fast charging that delivers a range of 200 kilometers after just 5 minutes of charging. Furthermore, Avatr 11—a joint venture created by Changan, Huawei, and CATL—also leverages an 800V high-voltage platform, allowing drivers to gain a 200-kilometer range with a 10-minute charge. Avatr is also accelerating the construction of standardized high-voltage fast-charging stations across China.
Notably, BYD’s Dolphin model also features 800V high-voltage fast-charging technology, enabling a range of 150 kilometers after just 5 minutes of charging. Meanwhile, the new HI version of Jihu Alpha S can deliver a range of 200 kilometers with a 10-minute charge. Additionally, Lantu boasts its own 800V high-voltage super-fast-charging technology, which, when paired with a 360kW supercharging station, boosts charging efficiency by up to 125%, allowing drivers to enjoy a 400-kilometer range after just 10 minutes of charging. Beyond the companies already implementing 800V high-voltage fast-charging technology, several other automakers’ executives have hinted at upcoming next-generation 800V fast-charging battery packs—among them are NIO and Great Wall’s Salon brand.
According to forecasts from relevant organizations, by 2025, China is expected to see 999,000 new energy vehicles equipped with an 800V high-voltage architecture. Globally, the number of new energy vehicles adopting this technology could reach 2.153 million. Moreover, 800V high-voltage fast-charging pure electric vehicles are not only set to further erode the market share of gasoline-powered cars but may also put hybrid and range-extended vehicles in an even more challenging position.

At the recent Super-Charging Technology Launch event hosted by XPeng Motors, He Xiaopeng boldly declared: Relying on ultra-fast charging, extended range, and its own network of charging stations, all-electric vehicles are poised to reshape the market landscape—and ultimately phase out hybrid models altogether. That’s because 800V high-voltage fast-charging technology not only delivers lightning-speed recharging, alleviating concerns about long wait times for energy replenishment, but also significantly reduces the weight and size of in-vehicle wiring harnesses. This, in turn, helps lighten the overall vehicle weight, boosts sustained power output, and effectively resolves the common issue of sluggish acceleration after startup. In essence, 800V high-voltage fast-charging technology addresses virtually every anxiety point associated with electric vehicles, making it a hotly sought-after focus for automakers worldwide.

Industry giants are actively making moves in the battery-swapping sector.

When it comes to addressing range anxiety for electric vehicles, automakers are not only expanding into the 800V high-voltage fast-charging sector but also continuously strengthening their efforts in battery swapping. Since last year, the battery-swapping model has drawn widespread attention across various industries—driven both by supportive government policies and by leading companies steadily increasing their investments in this burgeoning business.

In April 2021, China's automotive industry established the first foundational and universal national standard in the battery-swapping sector—*Safety Requirements for Electric Vehicle Battery Swapping*, filling a critical gap in industry standards and addressing the urgent need for standardized guidelines in this emerging battery-swapping model. Subsequently, the General Office of the Ministry of Industry and Information Technology issued the *Notice on Launching Pilot Projects for the Application of New-Energy Vehicle Battery-Swapping Models*, announcing the initiation of pilot programs across 11 selected cities, spanning multiple vehicle segments including passenger cars and commercial vehicles.
With policy support, the battery-swapping model for new-energy vehicles has garnered significant attention. Meanwhile, China's rapid development of the new-energy vehicle industry is posing substantial challenges to energy replenishment—particularly during holidays, when queues for charging remain a prominent issue. In this context, the battery-swapping model clearly highlights its inherent advantages. Compared to traditional charging methods, it offers distinct benefits in terms of enhanced vehicle utilization efficiency, dramatically reduced energy-replenishment time, extended battery lifespan, and greater convenience in maintenance and management—all while helping ease grid load. Additionally, the battery-swapping model brings advantages such as lower vehicle purchase costs, elimination of range anxiety, and improved safety standards, which have increasingly attracted more companies across the industry chain—and even automakers—to swiftly join this growing ecosystem.
Some industry insiders believe that, in addition to its advantages in energy-replenishment efficiency, battery swapping can also help regulate grid power by turning swap stations into distributed energy storage units within cities, thereby contributing to the achievement of the "dual carbon" goals. Meanwhile, traditional energy suppliers are also pursuing transformation and upgrading under the "dual carbon" initiative. For instance, Sinopec has announced plans to deploy 5,000 charging and battery-swapping stations during the 14th Five-Year Plan period.
Currently, companies adopting the battery-swapping model can be broadly categorized into two main types. The first includes automakers such as NIO, Geely, and GAC, which independently develop battery-swapping vehicles and operate their own swapping stations—providing this service exclusively for models within their own systems. The second category comprises power battery manufacturers like CATL, as well as third-party battery-swapping operators—including Sinopec, Xinxin Energy Technology, and Aodong New Energy—typically collaborating with renowned carmakers and battery producers to meet the diverse battery-swapping needs of multiple brands and vehicle models.

From the perspective of the overall vehicle enterprise deployment strategy, NIO stands out as one of China's automakers excelling in battery-swapping services. At NIO Power Day 2022, NIO unveiled a new plan to build an extensive high-speed battery-swapping network, aiming to complete coverage across "9 north-south routes, 9 east-west routes, and 19 major city clusters" by 2025. Additionally, NIO plans to roll out next-generation charging infrastructure—such as liquid-cooled super-fast charging piles with peak power of 500kW and peak current of 650A, as well as its third-generation battery swap stations—starting from the end of this year through early next year. Notably, the third-generation battery swap stations have already entered the pilot testing phase and are expected to support the upcoming 800V high-voltage platform.
For consumers, the most obvious advantage of battery swapping is the significant time saved on refueling. Take NIO cars as an example—there are already over 1,000 battery-swapping stations across China, and the number of users coming in daily to swap batteries continues to grow steadily. One car owner shared that each battery swap takes less than 5 minutes, thanks to fully automated, driverless operations that make the process incredibly convenient. According to Shen Fei, Senior Vice President of NIO Energy, the company has now provided its users with more than 10 million battery-swapping services. Meanwhile, Ruilan Automobile, a new battery-swapping mobility brand backed by Geely and Lifan’s advanced battery-swapping technology, positions itself as the "pioneer in popularizing lightweight battery-swapping solutions." Ruilan’s customers will soon be able to access battery-swapping vehicles and experiences at a more affordable entry point. In this context of differentiated competition, Ruilan Automobile is poised for even greater growth opportunities.

Battery power manufacturers like CATL are also eyeing the battery-swapping industry. In January of this year, CATL unveiled its battery-swapping service brand, EVOGO, along with the innovative "Chocolate" battery-swapping solution, and has swiftly begun expanding into commercial applications across various scenarios, while simultaneously building a robust, high-speed battery-swapping network. As a result of these strategic moves, discussions around the battery-swapping model have reached an all-time high. Prior to this, third-party operators such as Hangzhou Botan Technology and Aodong New Energy, as well as major enterprises like Huawei, China Southern Power Grid, Sinopec, China National Electric Investment Group, and GCL Group, have already been actively positioning themselves in the battery-swapping business.
Although the battery-swapping model for new-energy vehicles has gained significant popularity, it still faces numerous challenges compared to 800V high-voltage charging technology. First, the construction costs are exceptionally high—initial setup involves multiple factors such as land acquisition, manpower, and swapping equipment. It’s estimated that building a single battery-swap station could cost between 3 million and 5 million yuan, while even a small-scale station would require several hundred thousand yuan in investment, resulting in substantial upfront expenses. The second major challenge is the lack of standardized battery-swapping protocols among automakers. Currently, car companies haven’t yet achieved interoperability, meaning battery-swapping services remain limited to models within the same brand. This restricts the coverage area of the network, drives up capital investments, and creates a difficult situation where profitability remains elusive in the short term.
Earlier during the Two Sessions, Geely's Li Shufu put forward the "Proposal on Strengthening the Construction of an Electric Vehicle Battery-Swapping System," offering specific recommendations for building this infrastructure. Key suggestions include accelerating the construction of battery-swapping stations, streamlining regulations related to high- and low-voltage switchgear, as well as land use and construction approvals, and integrating these into the national market management framework. Additionally, he proposed further refining policy and regulatory frameworks for battery-swapping vehicles, optimizing the existing announcement procedures for such models, and establishing a dedicated certification system tailored specifically to battery-swapping vehicles—enabling separate certification processes for the vehicle itself and its battery under the "vehicle-battery separation" model. Moreover, efforts should be made to advance the standardization of battery-swapping packs, ensuring that these packs can truly be interoperable across different automakers, swapping stations, and users. Clearly, the current battery-swapping model for new-energy vehicles still has significant room for improvement. Both automakers focusing on building extensive swapping infrastructure and energy companies exploring entry into this space face critical challenges in promoting wider adoption of the battery-swapping approach.
With the rapid advancement of new-energy vehicle technologies, super-fast charging has emerged as the latest battleground for automakers. Since Xiaopeng Motors unveiled its pioneering S4 ultra-fast charger, the "super-charging camp" and the "battery-swapping camp" have once again sparked a lively debate online. Many netizens argue that if a 5-minute fast charge can deliver a range of 200 kilometers, there’d be no need for EV owners to queue up for battery swaps anymore. As a result, the ongoing discussion—whether fast charging or battery swapping is better—has quickly climbed to the top of online trending topics.

NIO Vice President Shen Fei refuted the claim on his social media account, stating that while fast charging is certainly beneficial, he disagrees that it surpasses battery swapping in terms of competitiveness. He outlined three key reasons: (1) Ultra-high power levels place even greater demands on batteries—perhaps explaining why only the top-spec G9 model supports S4 supercharging. (2) For instance, if four vehicles simultaneously arrive at a single 400kW charging station, each car would receive just 100 kW. However, if the station’s overall power capacity were increased further, system efficiency would actually decline, making infrastructure development particularly challenging. (3) On a daily basis, users often face a dilemma: Should they quickly charge for a few minutes and leave, or opt for a longer charging session? Meanwhile, Tesla executives—who support the fast-charging approach—previously noted in 2013 that Tesla had already experimented with battery swapping. While this model remains viable in certain niche applications, such as taxis or buses, Tesla has consistently maintained that charging remains the most practical and scalable solution for powering electric vehicles on a mass-market scale.
In fact, whether it's fast charging or battery swapping, the ultimate goal is to provide users with more convenient services, thereby alleviating range anxiety. However, both methods still have several limitations. Currently, super-fast charging places high demands on batteries—take XPeng’s S4 ultra-charging technology as an example; only the top-spec XPeng G9 supports it. Meanwhile, the power output of charging stations is limited. If there are many vehicles waiting to charge, the available power will inevitably drop, leading to longer charging times—a problem that urgently needs to be addressed. As for battery swapping, although the service and user experience have already gained recognition, the inability of vehicles from different brands to use each other’s systems poses a significant challenge to companies’ profitability. Moreover, as the number of used batteries increases, cost pressures will only become more pronounced.

Previously, Cui Dongshu, Secretary-General of the China Passenger Car Association, once stated that private cars may not be the best starting point for promoting battery-swapping services. According to his calculations, a single battery-swap station needs to serve at least around 340 vehicles to reach its break-even point. If only private car users adopt this model, the path to profitability would likely take significantly longer. However, for commercial vehicles, a single battery-swap station could achieve strong financial returns by servicing just 40 to 60 vehicles. Of course, he also pointed out that the battery-swapping model offers clear advantages in certain scenarios, but the private-car market will find it challenging to develop effectively in the short term. Ultimately, long-term growth will depend on breakthroughs in supercharging technology.
In the industry's view, home charging piles, ultra-fast charging stations, and battery-swapping stations will become the three primary methods for replenishing energy in future electric vehicles. Different companies will choose one or more of these approaches, adopting a parallel strategy. However, whether it’s battery swapping or charging, large-scale deployment is essential to ensure that pure electric vehicles can offer a convenient, quick experience comparable to refueling gasoline cars.
As the market penetration of new-energy vehicles surges, higher demands are being placed on charging and energy replenishment for electric cars. In addition to continuing to improve infrastructure, high-voltage fast charging and battery-swapping models have likely become a consensus among automakers and industry players. High-voltage fast charging addresses range anxiety, while battery swapping helps extend battery life—these two approaches complement each other and are expected to evolve in parallel for the foreseeable future, ultimately delivering a superior driving experience for consumers.

Translated from Sina Auto

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