Panasonic Energy Co., Ltd. (“Panasonic Energy”), a Panasonic Group Company, today announced that it has finalized preparations for mass production of the 4680 cylindrical automotive lithium-ion batteries, marking a much-anticipated breakthrough in the industry. The company has also revamped its Wakayama factory in Western Japan, which will serve as the mother factory for the new cells. An opening ceremony was held today to commemorate the occasion. The mass production is set to start after the final evaluation.
The 4680, a revolutionary cell format of cylindrical lithium-ion batteries for electric vehicles (EVs), offers substantial improvements over the conventional 2170 cells. These new cells possess five times the capacity of the 2170 cell. This not only extends the driving range of EVs, but also reduces the number of cells required for the same battery pack capacity. This results in a more efficient battery pack assembly process and ultimately lowers the cost of EVs, making them more affordable to a wider market.
The manufacturing process of the 4680, with its larger capacity per cell, requires more advanced technology and expertise. Leveraging its 30 years of know-how in the development of cylindrical lithium-ion battery technology, Panasonic Energy has pioneered a mass production method for high-performance 4680 cells, setting a benchmark in the industry.
The Wakayama factory, a base for the manufacture of lithium-ion battery parts, has undergone a transformation. It will now act as the mother factory for the production of 4680 cells and will serve as a demonstration hub for new products and methods. The factory will play a key role enhancing product quality and competitiveness, with processes newly trialed there set to be implemented globally in other factories. By March 2025, it is expected that roughly 400 staff will be involved in the development and production of next-generation batteries at the Wakayama factory.
With the goal of achieving environmentally-friendly manufacturing, the Wakayama factory plans to utilize renewable energy sources like solar power and onshore wind power to the fullest extent, aiming for virtually zero CO2 emissions during its production processes. This eco-conscious approach has already been successfully implemented at the company’s Moriguchi base and Kaizuka factory in Osaka, resulting in the achievement of carbon neutrality across all nine of the company’s domestic bases as of September 2024. Panasonic Energy aims to extend this achievement to all 20 of its global bases by March 2029. Kazuo Tadanobu, President and Executive Officer, Panasonic Energy, said, “I am excited that we are ready to start the mass production of the cutting-edge 4680 cell. This milestone is the result of years of expertise in cylindrical lithium-ion battery manufacturing. I’m confident it will significantly revolutionize the battery and EV industry. As we add the 4680 cell to our lineup, we’ll cater to a broader range of needs, further promoting the use of EVs and advancing our mission of fostering a sustainable society.”
Wakayama Factory Details
| Factory name | Panasonic Energy Co., Ltd. Wakayama Factory |
| Location | 612-1 Uchita, Kinokawa City, Wakayama Prefecture |
| Date of establishment | April 1991 |
| Items produced | Cylindrical automotive lithium-ion batteries (4680 cells) and components for lithium-ion batteries |
| Total site area | 99,177m2 |
| Building area | 60,907 m2 |
| Number of personnel | Approximately 400 (planned for fiscal year ending March 2025) |
SOURCE: Panasonic
