Hitachi Li-Ion offers 4,500W/kg power density

May 28, 2009
Hitachi, Ltd. and Hitachi Vehicle Energy, Ltd. have developed a lithium-ion battery with power density of 4,500 W/kg, which is 1.7 times the output of the company’s mass-produced, automotive lithium-ion batteries.

Hitachi, Ltd. and Hitachi Vehicle Energy, Ltd. have developed a lithium-ion battery with power density of 4,500 W/kg, which is 1.7 times the output of the company’s mass-produced, automotive lithium-ion batteries. Sampling of the new battery will start this fall.

To reduce internal resistance, the battery employs a new manganese cathode and an original Hitachi battery structure. Hitachi said that for the same energy density, a lithium-ion battery has about half the volume and weight of a nickel hydrogen battery, and about one-third the volume and weight of a lead battery.

In 2000, the Hitachi Group developed and mass-produced a lithium-ion battery for automotive applications. A second-generation lithium-ion battery with a power density of 2,600 W/kg is currently being delivered for on-board automotive applications. A total of some 600,000 cells have been delivered, mainly to car manufacturers and railway companies.

Development of a third-generation lithium-ion battery with a power density of 3,000 W/kg has been completed. That battery will go into mass-production in 2010.

The fourth-generation battery set to start sampling this fall is smaller and lighter yet able to provide 4,500W/kg output.

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!