Battery pack, tool battery and battery operated tool

The lithium-polymer based battery pack of claim 21, wherein each battery cell is located and supported within a cell channel defined through a face on the respective resiliently deformable cradle.

The lithium-polymer based battery pack of claim 21, wherein the cradle frame is a case enclosure having a base and four surrounding side walls defining a cavity for holding the stack of the plurality of battery cells,

• wherein an opening is provided in each of the opposed end side walls of the case enclosure to allow space for and accommodate connection access to a plurality of terminal tabs connecting the plurality of battery cells within the case enclosure, and
• wherein each of the plurality of terminal tabs are provided with an exposed connection terminal disposed on a surface of the cover.

The lithium-polymer based battery pack of claim 21 wherein each of the battery cells includes an anode electrode sheet, a cathode electrode sheet, and a lithium-polymer based substrate located between the anode and cathode electrode sheets, and

• wherein each of the battery cells is generally flat and has a cell width and a cell thickness, the cell thickness being less than 15% of the cell width.

The lithium-polymer based battery pack of claim 21, wherein the plurality of battery cells are layered within the housing such that each battery cell is lying adjacent to another one of the battery cells, and further including a resiliently deformable substrate between the adjacent battery cells.

The lithium-polymer based battery pack of claim 25, wherein the resiliently deformable substrate defines the resiliently deformable cradle, and

• wherein the side edges of the resiliently deformable cradle integrally combine with the resiliently deformable substrate.

The lithium-polymer based battery pack of claim 26, wherein the resiliently deformable substrate is thermally conductive,

• wherein the lithium-polymer based battery pack includes at least one sensor element located between at least two adjacent ones of the battery cells, said sensor element providing a sensor signal to a battery controller, and
• wherein the sensor element includes a temperature sensor.

The lithium-polymer based battery pack of claim 25, wherein a pressure sensing element is located between at least two adjacent ones of the battery cells, the pressure sensing element configured to provide a pressure sensor signal to a battery controller.

The lithium-polymer based battery pack of claim 21, wherein the housing defines a housing volume and the plurality of battery cells provides a combined battery volume, and wherein a ratio of the combined battery volume to the housing volume is greater than 80%.

The lithium-polymer based battery pack of claim 21, wherein each of the battery cells includes a first connection lead connected with an anode electrode sheet of the battery cell and a second connection lead connected with a cathode electrode sheet of the battery cell, the first connection lead extending from a first edge of the battery cell and the second connection lead extending from a second edge of the battery cell, the second edge being a different edge than the first edge.

The lithium-polymer based battery pack of claim 20, wherein the plurality of battery cells are stacked within the housing such that each battery cell is lying adjacent to another one of the battery cells,

• wherein at least one of the first and second connection leads are joined with a connection lead of an adjacent battery cell.

The lithium-polymer based battery pack of claim 21, further including a guide member having a convex guiding surface abutting the joined connection leads extending between adjacent battery cells.

The lithium-polymer based battery pack of claim 21, wherein each resiliently deformable cradle includes two or more resiliently deformable members each abutting at least one respective battery cell.