One of the persistent barriers to EV adoption is charging time, especially when compared to the speed and convenience of conventional refueling. Addressing this particular constraint has become a top focus of battery and energy storage innovations across the EV industry.
In 2025, BYD announced its one-megawatt Flash Charging system, which it claims can deliver a full charge to upcoming EV models in five to eight minutes, roughly the time required to refuel a gasoline vehicle. According to the company, the system uses in-house–developed silicon carbide (SiC) power chips rated for up to 1,500 volts, enabling rapid energy transfer with reduced thermal loss. The chargers, BYD says, can add enough energy for about 250 miles of driving in five minutes, supported by a planned rollout of more than 4,000 high-power charging stations across China.
As electric mobility continues to reshape the global automotive landscape, BYD (Build Your Dreams) has become a prominent player in the ongoing transition toward large-scale electrification.
Founded in 1994 as a battery manufacturer, the company has since expanded into electric vehicles and energy storage. It has become one of China’s largest producers of electric vehicles and energy storage systems. Its vertically integrated operations span materials research, battery production, power electronics, and vehicle assembly, allowing development and testing across several stages of the value chain, often in parallel with policy and infrastructure developments in China’s domestic EV market.
Ultra-fast charging technology
Beyond its charging technology, BYD has also expanded the range of vehicles that could eventually benefit from faster charging. The company now sells plug-in cars and SUVs across a wide range of segments, from entry-level models like the Seagull to high-performance flagships such as the Yangwang U9. Industry analysts have noted that BYD’s Blade lithium iron phosphate battery, introduced in 2020, remains a central part of this strategy, with China-watcher Michael Dunne describing it as “ the world’s safest and most efficient battery.” BYD recently began pre-sales of its next-generation Han L and Tang L models, and reported producing 4.3 million new energy vehicles in 2024, a 41%increase from the previous year. This included 1.8 million battery-electric vehicles and 2.5 million plug-in hybrids, reflecting the scale at which any ultra-fast charging technology would need to operate.
State support behind BYD’s fast-charging venture
In 2024, the company reported revenue of approximately 777 billion yuan (about $107 billion), reflecting its dominance in China’s clean-energy sector and its growing role in international markets. Yet BYD’s expansion has been closely tied to China’s industrial policy. According to an analysis published by Intereconomics, data from the company’s annual reports show that BYD received about €3.4 billion (about $3.7 billion) in direct government subsidies between 2018 and 2022, primarily aimed at supporting electric vehicle manufacturing and battery production.
The reliance on government support has drawn renewed scrutiny. In mid-2025, a government audit found that BYD and several other automakers might need to repay a portion of misallocated subsidies, totaling hundreds of millions of yuan. While the audit’s findings covered only a fraction of the firm’s total output, it highlighted the broader regulatory pressure surrounding China’s incentive-driven EV boom.
Even so, BYD’s multibillion-yuan investments in next-generation battery facilities, including a 10 billion yuan (about USD 1.4 billion) sodium-ion production plant in Xuzhou, show how the company is redirecting both public and private capital toward faster-charging, lower-cost chemistries. Whether these technologies can deliver on the promise of five-minute charging at commercial scale remains uncertain, but its growing body of patent filings shows that BYD is positioning itself to define the next technical frontier in electric mobility.
BYD: Patenting Activity
Our data shows that BYD’s patenting activity increased after 2020, while also reflecting an increased focus on large-scale innovations in battery storage and fast charging systems. This period aligns with the company’s development of the Blade Battery and its early research into next-generation chemistries such as solid-state and sodium-ion cells.
The increase in patent filings between 2021 and 2024 indicates a period of elevated R&D activity, with BYD filing more applications across cell design, power management, and thermal regulation.
BYD: Top Jurisdiction
BYD’s patent distribution highlights a clear evolution from a China-centered IP strategy to an increasingly globalized patent footprint. The company continues to anchor most of its intellectual property in China, with more than 8,000 patents granted domestically, but the rapid rise in pending applications across major foreign offices signals a deliberate international expansion.
The European Patent Office (EP) now accounts for the largest share of BYD’s foreign pending filings, reflecting the company’s intent to secure protection in one of the most competitive EV markets. This strategic focus aligns with BYD’s growing commercial presence in Europe, where new car registrations more than tripled in 2025. Similar trends in Japan, Korea, and the United States suggest a coordinated effort to defend BYD’s technologies in regions with strong automotive and semiconductor industries, areas critical for partnerships, component sourcing, and regulatory alignment.
The presence of growing portfolios in India, Brazil, Australia, and Germany further shows BYD’s effort to establish patent coverage in emerging and strategic markets, mirroring its ongoing manufacturing and export expansion.
BYD: Top Technology Areas
BYD’s patent portfolio is predominantly focused on energy generation, storage, and electrochemical systems, highlighting its fundamental identity as a battery-centric technological firm rather than a conventional automobile manufacturer.
The predominant portion of its registrations pertains to Y02E (low-carbon energy generation, storage, and distribution) and H01M (batteries, fuel cells, and electrochemical systems), collectively representing about fifty percent of all global files from 2015 to 2025. These categories encompass advancements in lithium iron phosphate (LFP) chemistry, sodium-ion and solid-state batteries, as well as integrated storage systems that facilitate high-rate charging.
A notable secondary cluster exists in B60L (electric vehicle propulsion and charging) and H02J (power supply circuits and charging control), domains closely associated with BYD’s objective of five-minute charging. These patents encompass contemporary regulatory systems, battery management frameworks, and thermal dissipation designs, facilitating ultra-fast charging rates without jeopardizing safety or longevity.
Engagement in Y02T (climate-friendly transport technologies) and B60K (vehicle powertrain architecture) underscores BYD’s comprehensive systems-level efforts in efficiency and drivetrain integration. The data indicates a research environment centered on energy density, charging speed, and thermal stability, the three technical factors that characterize BYD’s fast-charging strategy.
BYD: Top Law Firms
BYD’s patent filings are supported by a consistent network of China-based intellectual property law firms, reflecting a strategy centered on domestic R&D protection before expanding internationally. The company’s top firms, Innotrack Intellectual Property, Tsingyihua Intellectual Property, and Zhifan & Partners, each handled more than 1,700 filings between 2015 and 2025, underscoring their long-term roles in securing BYD’s growing patent portfolio.
Firms such as JW & Partners, Beyond Talent Patent Agent Firm, and Shenzhen Scihead Creation IP Law Firm also manage hundreds of applications annually. The concentration of representation within domestic agencies suggests that BYD continues to prioritize Chinese filings as the foundation of its IP strategy, leveraging local legal expertise for speed and cost efficiency before extending key patents through the Patent Cooperation Treaty (PCT) route.
Patents powering BYD’s vision for ultra-fast and smarter electric mobility
BYD’s fast-charging research spans the full EV system, linking battery materials, charging infrastructure, and vehicle design. The following three patents illustrate this progression from cell chemistry to charging control and pack integration, outlining how BYD translates lab-scale advances into real-world applications.
Layered battery structure boosts stability and speed
Fast charging remains one of the biggest hurdles in making electric vehicles as convenient as conventional cars. Even as modern batteries get safer and more affordable, they still struggle to take in large amounts of energy quickly without losing capacity or overheating. BYD’s research team approached this challenge by rethinking the chemistry of the battery itself, aiming to build a material that can handle rapid charging while staying stable over time.
CN114256448 stands out as BYD’s most cited patent, with 89 forward citations. It introduces a new way to build the battery’s core material by giving it a protective layered structure. The design strengthens the material’s resistance to wear and chemical breakdown, allowing it to charge faster and last longer.
The patent figure below illustrates the structure of the lithium manganese iron phosphate composite material described in the patent. The image shows a core–shell configuration, where the LiMnxFe₁₋ₓPO₄ core is surrounded by multiple coating layers that enhance stability and reduce degradation during fast charging.
The patent application, titled “Lithium manganese iron phosphate composite material, preparation method thereof and lithium ion battery,” was filed on September 25, 2020, and published on March 29, 2022. It was initially filed through Scihead IP Law Firm , with Xiong Yongqiang as the registered agent. The listed inventors are Chen Na, Hao Rong, and Pan Yi.
Dynamic charging for EVs on the move
Charging infrastructure remains one of the biggest constraints on electric vehicle adoption. Even as battery capacity grows, drivers are still limited by fixed charging points and long wait times. To address this, BYD explored a concept where vehicles can receive power while in motion or away from stationary stations.
CN107351694 presents BYD’s vision for a dynamic charging network that enables electric vehicles to recharge while in motion. It introduces a system built around mobile power-supply vehicles. These units can locate electric vehicles that need energy through real-time data exchange, using a combination of battery status, GPS positioning, and driving information to plan a meeting route. Once both vehicles align, the system enables direct energy transfer according to preset charging modes, effectively allowing an EV to recharge without interrupting its journey.
The patent, titled “Mobile charging method, device and system for vehicle,” was filed on May 9, 2016, and granted on July 10, 2020. The patent is represented by Innotrack Intellectual Property Law Firm, with Nan Yining and Sang Chuanbiao listed as the patent agents. The listed inventors include Wang Yue, Zhao Ziqiang, and Wang Pengpeng.
Reinforcing the future of battery design
As electric vehicles evolve, improving energy density is no longer just about chemistry but also about how batteries are arranged and supported inside the car. Traditional battery packs require heavy metal frames or complex casings to protect cells from vibration and impact, which adds weight and reduces usable space. BYD’s engineers sought a way to make the battery itself a structural element, simplifying the pack while increasing efficiency.
CN111009629, introduces BYD’s innovation in structural battery design through a reinforced cell-to-cell architecture where individual batteries are connected side by side through a structural adhesive component. This configuration allows the combined assembly to act as a stiffening beam, reducing the need for additional support structures within the pack housing. The result is a lighter, more compact design that improves volume utilization and mechanical stability, both essential for longer range and faster charging performance.The patent, titled “Battery pack and electric vehicle,” was filed on November 18, 2019, and granted on February 8, 2022. The patent was represented by JW & Partners. The listed inventors are He Long, Sun Huajun, Zhu Yan, Tan Liangwen, and Wan Long.
