Patent Number: 8,574,738

Title: Battery pack assembly with integrated heater

Abstract: A battery pack assembly for providing electric power to a load includes a battery pack, preferably made up of a plurality of lithium ion cells. A heating device formed of a flexible material flexes and covers at least part of the battery pack. The heating device includes a meandering heating strip. A thermal sensor is surrounded by the heating strip to sense the temperature of the battery pack. Electric current is applied to the heating strip to heat the battery pack when its temperature falls too low, thus improving performance of the battery pack. The heating device also includes a plurality of tabs extending beyond the peripheral sides of the heating device for direct connection to the cells. Thus, electric current for the heating strip is provided directly from the cells of the battery pack.

Inventors: Fattig; Robert N. (Anderson, IN)

Assignee: EnerDel, Inc.

International Classification: H01M 10/50 (20060101); H01M 10/48 (20060101)

Expiration Date: 1/05/12017