CATL $3750 (+4.02%) has entered into a partnership with Chinese electrical appliance manufacturer Shanghai Sieyuan Electric, marking the battery giant's latest advance in the field of energy storage.
The two companies signed a three-year cooperation agreement in the field of energy storage with a target volume of 50 GWh, CATL announced in a press release today.
Both parties will leverage their respective strengths to improve the synergy efficiency of the supply chain and drive high-quality development in the field of energy storage, CATL said.
Over the next three years, the two companies will achieve upstream and downstream supply chain coordination around energy storage systems and supporting equipment such as transmission and distribution facilities, according to the statement.
The two companies will also strengthen technical exchanges and project cooperation to accelerate the large-scale application of energy storage systems in new power grids.
Sieyuan, based in Shanghai, is a company engaged in energy technology research and development and equipment manufacturing. According to its website, the company's turnover in 2024 amounted to RMB 15.5 billion (USD 2.2 billion) and it operated in over 100 countries and regions.
The company employed 9,456 people in 2024 and invested RMB 1.11 billion in research and development.
Sieyuan and CATL first entered into their partnership in 2022. This latest move deepens their cooperation and strengthens synergies in the field of energy storage.
CATL is the world's largest manufacturer of batteries for electric vehicles, with energy storage also being one of its core businesses.
In the first half of 2025, CATL's energy storage systems contributed RMB 28.4 billion to revenue, accounting for 15.87% of the total revenue of RMB 178.9 billion, according to the interim report.
In the same period, the electric vehicle battery segment achieved sales of RMB 131.6 billion, which corresponds to 73.56% of total sales.









