Support structure for a duct
A support structure 1 for a flexible, heat-exchanging duct of the type that is locatable proximal to cells 4 of a battery pack for thermally managing the battery pack. The support structure 1 is configured to provide support to a duct to prevent the duct kinking when the duct changes direction.
1. A battery pack comprising an array of cells, a flexible, heat-exchanging duct located proximal to cells of the battery pack, and at least one support structure for the duct, the support structure being configured to provide support to the duct to prevent kinking, bulging and/or bursting of the duct at positions where the duct emerges from an array of cells, changes direction and re-enters the array of cells, the support structure comprising an inner guide formation, and outer guide formation and a guide path located between the inner guide formation and the outer guide formation.
2. A battery pack as claimed in claim 1 , wherein the support structure is dimensioned such that cells positioned on an end of each row of the array have substantially the same thermal contact area with the duct as cells located in a centre of the array and wherein the support structure is shaped such that one end of an inner supporting face abuts an end cell.
3. A battery pack as claimed in claim 2 wherein the support structure is shaped such that an other end portion of the inner supporting face partially follows a surface of another end cell such that the other end portion wraps around the other end cell to form a thermal insulating barrier.
4. A battery pack as claimed in claim 2 wherein the support structure is shaped such that at least one end of an outer supporting face abuts a cell.
5. A battery pack as claimed in claim 1 , wherein the support structure is adapted to guide the flexible duct smoothly through one or more 90° bends.
6. A battery pack as claimed in claim 1 , wherein the guide path is configured such that the duct follows the guide path from a point that the duct emerges from the array to a point that the duct re-enters the array when in use.
7. A battery pack as claimed in claim 1 , wherein the guide path is a slot or channel into which the flexible duct may be inserted and that the flexible duct then follows so as to change direction without kinking.
8. A battery pack as claimed in claim 7 , wherein the channel provides support to the duct on both sides.
9. A battery pack as claimed in claim 1 , wherein the inner guide formation is located on an inside of a turn of the flexible duct.
10. A battery pack as claimed in claim 9 , wherein the inner guide formation has an inner supporting face that is located between a cell and the flexible duct when in use.
11. A battery pack as claimed in claim 6 , wherein the inner guide formation is dimensioned such that a bend radius of the inner supporting face is large enough to guide the flexible duct smoothly through 180° without the duct kinking.
12. A battery pack as claimed in claim 10 , wherein the inner supporting face is discontinuous.
13. A battery pack as claimed in claim 10 , wherein the inner supporting face comprises a planar elongate facet between two radiused edges.
14. A battery pack as claimed in claim 9 , wherein the support structure comprises an inner thermally-insulating block that extends away from the inner guide formation.
15. A battery pack as claimed in claim 9 , wherein at least part of the inner guide formation is compressible.
16. A battery pack as claimed in claim 1 , wherein the outer guide formation has an outer supporting face.
17. A battery pack as claimed in claim 16 , the support structure comprising an outer thermally-insulating block that extends outwardly and away from the outer guide formation.
18. A battery pack as claimed in claim 16 , wherein the outer supporting face is discontinuous.
19. A battery pack as claimed in claim 1 , wherein the support structure comprises at least one recess or opening configured to partially receive the duct in an uninflated state such that slack is created in the duct.
20. A battery pack as claimed in claim 1 , wherein the support structure is configured to provide a thermal barrier between at least one cell and the duct when in use.
21. A battery pack as claimed in claim 1 , wherein the support structure is configured to be located within the battery pack at positions where the duct changes direction.