LOUISVILLE - Solid Power LLC received $3.5 million from a Department of Energy program to develop new battery technology to improve the driving range of electric cars.

The Louisville-based company was founded by University of Colorado-Boulder professors in 2012 to continue their research on rechargeable batteries, according to the company's website. A Solid Power representative was not immediately available for comment about how the federal grant might affect company growth.

Funds come from the federal Advance Research Projects Agency-Energy program in the Department of Energy, according to a press release.

Solid Power is funded by a National Science Foundation Small Business Innovation Research grant, according to the company's website. Previous research was funded by the federal Defense Advanced Research Projects Agency's Defense Science Office.

Separately, a $999,088 grant from the federal DoE program went to the National Renewable Energy Laboratory in Golden to develop a new low-cost battery that will use organic energy storage materials.

The Advance Research Projects Agency-Energy program, or ARPA-E's initial $400 million budget came from the 2009 American Recovery and Reinvestment Act. The program received $180 million in 2011 and $275 million in 2012.

Several other Colorado research and development projects have received funding through the program in recent years, including a Littleton company working on a battery and a Colorado State University project to help cars run on natural gas, according to a press release.