time：2025-09-02 source：高工鋰電
On August 26th, BYD's flagship pure electric supercar U9 achieved a top speed of 472.41km/h during engineering testing, breaking the global electric vehicle speed record and surpassing the previous 438.73km/h set by the Japanese supercar Aspark Owl SP600, becoming the fastest mass-produced pure electric vehicle in the world.
Looking up at U9, it is equipped with the world's first mass-produced all domain 1200V ultra-high voltage platform, equipped with four motor independent drive. The peak power of a single motor reaches 555kW, and the overall power of the vehicle reaches 2220kW (about 3018 horsepower).
However, what is more noteworthy is that the support for this 3000 horsepower pure electric racing car is not the ternary lithium that was previously closely tied to the high-end market, but the use of lithium iron phosphate power batteries.
Can flash charge or flash release
In the 398th batch of announcements by the Ministry of Industry and Information Technology in early August, the information on the newly added models of the U9 has been made public. At that time, the publicly announced parameters showed that the vehicle's power performance indicators were at the top level, but it was equipped with lithium iron phosphate batteries.
This combination of "high-performance data+LFP system" also had reservations from the outside world at that time.
According to foreign media, a senior executive of an overseas supercar brand once questioned whether the 3000 horsepower power output of the U9 can be achieved.
He pointed out that achieving a power release of over 2000kW in a very short period of time requires extremely high requirements for battery cell, battery pack design, thermal management, and electrical architecture. As a comparison, he gave an example of a three motor supercar with a peak power of 1000kW to 1500kW that can support over 2100 horsepower.
And this test has just added a case to the industry where lithium iron phosphate can achieve a high-power discharge of 2220kW (about 30C) on racing cars.
In March of this year, BYD released megawatt level supercharging technology, which is based on a 1000V high-voltage platform and 1000A ultra-high current. Through the second-generation blade battery, it achieved peak fast charging of 10C and average fast charging of 6C, proving the fast charging potential of lithium iron phosphate batteries.
Although fast charging and fast discharging are not completely equivalent, fast charging technology can still provide reference for understanding the high-power discharge potential of lithium iron phosphate to a certain extent. There is a certain commonality in the requirements for the power battery system capability between the two, both requiring a high-voltage platform to reduce current load, low internal resistance and large cross-sectional flow of the battery cell and battery pack, as well as effective thermal management and precision control strategies.
Looking up at the U9 test case, it has been proven that with appropriate battery cell design and vehicle system matching, lithium iron phosphate batteries can support a fast release of 3000 horsepower for racing cars, and can also serve extreme performance requirements.
High end cars can also use lithium iron phosphate
Although the U9 has limited sales in the niche supercar market, as the first mass-produced model of a Chinese brand to achieve ultra-high power output with lithium iron phosphate batteries, its technological demonstration effect and industry benchmark significance far exceed the sales volume itself, driving the industry to re-examine the performance potential and application market of lithium iron phosphate.
As a representative technology of the rise of new energy vehicles in China, lithium iron phosphate power batteries have started from economical and mainstream passenger cars, and continue to penetrate the high-performance and high-end markets through optimized cell design, high-voltage platform, and thermal management upgrades, with a combination of "800V+lithium iron".
Among BYD's mass-produced high-end models, the million level pure electric flagship sedan, the U7, and the high-end MPV, the Tengshi D9 DM-i, also use BYD lithium iron phosphate blade batteries.
The high-end version of Jike 001 uses a 95kWh Shenxing Supercharged LFP battery, competing with three yuan in the 300000 yuan market; Ideal 2025's new large pure electric SUV i6 series comes standard with an 800V high-voltage platform and is equipped with CATL's new generation 5C lithium iron phosphate battery.
The technological advantages of lithium iron phosphate are also affecting the choice of joint venture brands, and they are beginning to try LFP high-end.
The Mercedes Benz GLC plug-in hybrid version, which is in the planning stage, is the first attempt at using lithium iron phosphate batteries for the 300000 yuan market. When the news was first released, it also sparked discussions in the industry about the luxury positioning of lithium iron batteries.
The emergence of the above installation cases proves that the high-end market is not a monolithic entity for lithium iron phosphate batteries.
According to GGII data, the installed capacity of domestic lithium iron phosphate power batteries in the first half of 2025 will be approximately 223.1 GWh, a year-on-year increase of 71%, accounting for 77.4% of the market share, an increase of 12.5 percentage points compared to the same period last year.
But with the continuous iteration of technology and the landing of high-end applications, this market pattern may continue to be influenced by lithium iron phosphate, and ternary batteries may face greater pressure to consolidate their installed share in the mid to high end passenger car field.
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