In March this year, BYD unveiled its “Flash Charging China” strategy, aiming to build 20,000 flash charging stations by the end of 2026. Its megawatt-level charging technology delivers up to 1 MW of power, enabling a peak charging speed equivalent to “2 kilometers of range per second,” and adding about 400 kilometers of range in just 5 minutes. A fully liquid-cooled system ensures sustained high-power output. The industry views this breakthrough as the beginning of an era where EV charging rivals refueling in speed. Behind this game-changing system stands a lesser-known company from Fuyang, Anhui playing a key role.

“Right now, only a handful of companies in China can manufacture casings for megawatt flash charging systems—apart from BYD itself, there are just two external suppliers, and we are the only one in Anhui,” said Hu Yinghe, head of the Fuyang base of Jinyi Precision Manufacturing, gesturing proudly toward neatly stacked products ready for shipment. Since establishing operations in Funan in July 2024, the company quickly entered BYD’s supply chain and has become a key supplier of charging casings.

Such extreme charging power places exceptionally stringent demands on the casing. Under megawatt-level operation, temperatures rise rapidly, requiring the casing not only to withstand intense thermal loads but also to guarantee absolute sealing of the liquid-cooling system—any leak, however small, could lead to serious consequences.

“The toughest part is controlling leakage after welding,” Hu explained. The casing consists of a main body and an aluminum plate, joined using friction stir welding. This process creates intricate internal liquid-cooling channels to dissipate heat generated during high-voltage charging. “We conduct airtightness tests, and finished products must also undergo helium leak detection—helium molecules are smaller, making the test more precise. There is zero tolerance for leaks.”

It took the company only a few months to move from technical breakthroughs to stable mass production. It now supplies large volumes of charging casings consistently, providing critical support for BYD’s flash charging systems.

Inside Jinyi Precision, the sense of racing against time is evident everywhere. Founded in July 2024, the company secured its plant in September and, after upgrading it into a temperature-controlled facility, achieved mass production by November. In just over six months, 160 employees working within a 10,800-square-meter factory generated sales of RMB 20 million by the end of 2024 and RMB 70 million in the first quarter of 2025.

Not far from the temporary facility, Jinyi Precision’s new self-built industrial park—backed by a total investment of RMB 2.8 billion—is rapidly taking shape. Covering 127 mu (about 8.5 hectares) with a total floor area of 85,000 square meters, the project is expected to be completed and operational by July 2027, with an annual production capacity of 3 million sets of key components for new energy vehicles.

With the completion of the new plant and full release of its production capacity, this low-profile company in Funan is poised to play a much more significant role in the new energy vehicle supply chain.

Source: anhuinews.com