The first phase of the project, with an investment of RMB 5 billion, is expected to start production in December.

BYD's installed power and energy storage battery capacity in December was about 11.152 GWh, up 120.88 percent from 5.049 GWh in the same month last year and up 1.35 percent from 11.003 GWh in November, according to data released by the company earlier this month.

For the full year 2022, BYD's battery installed base was 89.835 GWh, up 136.90 percent from 37.921 GWh in the same period last year.

In the global market, BYD ranked second with a 13.6 percent share from January to November, according to data released by South Korean market research firm SNE Research on January 4.

CATL's power battery installed base was 165.7 GWh during the same period, ranking first with a 37.1 percent market share.

BYD currently has about 20 power battery production bases in China.

Local brokerage Founder Securities expects BYD's battery capacity to reach 285 GWh by the end of 2022 and possibly 445 GWh by 2023 in a research note dated June 6, 2022. BYD had 135 GWh of battery capacity at the end of 2021.

In late November, a press release from the Wenzhou government in Zhejiang province said BYD plans to build a new power battery production base in the city with a planned annual capacity of 20 GWh, with the first production line expected to be operational in 2024.

The production base is located in Wenzhou's Qiaotou town, Yongjia county, and the power batteries planned to be produced will use one of the highly promising battery technologies currently available, the release said, without disclosing the specific technology.