Patent ID: 8507125

Claim:
A monoblock lithium ion battery assembly comprising: a battery having: a battery top and a battery bottom; a first planar battery side extending between the battery top and the battery bottom; a second planar battery side extending between the battery top and the battery bottom parallel to said first planar battery side; a first battery end extending between the battery top and the battery bottom and between the first battery side and the second battery side; and a second battery end extending between the battery top and the battery bottom and between the first battery side and the second battery side; and a first spring having: a spring top and a spring bottom; a first spring wall extending between the spring top and the spring bottom; a second spring wall extending between the spring top and the spring bottom; wherein the spring top, first spring wall, spring bottom and second spring wall form a closed loop that is disposed around the battery such that the spring top engages the battery top, the spring bottom engages the battery bottom, the first spring wall engages the first battery side, and the second spring wall engages the second battery side, the first and second spring walls applying opposing compressive forces to the first and second parallel planar sides of the battery, respectively.