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An energy storage system comprising at least one energy storage module adapted to supply electrical energy to a hybrid vehicle. The energy storage module comprises an enclosure, at least one battery array located within the enclosure comprised of one or more battery cells held in place between side

An energy storage system comprising at least one energy storage module adapted to supply electrical energy to a hybrid vehicle. The energy storage module comprises an enclosure, at least one battery array located within the enclosure comprised of one or more battery cells held in place between side rails and secured by end plates and mounting pins. The end plates also include flanges which secure the end plates behind the pins. The pin arrangement provides more secure holding and helps prevent torque loosening during operation. The battery array also includes cell retainers between each cell to reduce thermal transfer between cells, and an insulation liner between the battery cells and the side rails to improve creepage and clearance.

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1. An energy storage system, comprising: at least one energy storage module configured to supply electrical energy to a hybrid vehicle, the energy storage module comprising:a primary enclosure;at least one battery array located within the primary enclosure, the battery array comprising:a plurality o

1. An energy storage system, comprising: at least one energy storage module configured to supply electrical energy to a hybrid vehicle, the energy storage module comprising:a primary enclosure;at least one battery array located within the primary enclosure, the battery array comprising:a plurality of parallel side rails, the side rails having rail mounting holes at each end of the side rails;a plurality of battery cells positioned along the side rails;a plurality of end plates positioned substantially perpendicular to the side rails, each plate having a plurality of plate mounting flanges extending away from the end plates, and;a plurality of mounting pins;wherein the plate mounting flanges and rail mounting holes are located such that a mounting pin can be inserted through a rail mounting hole and adjacent the plate mounting flange to secure the battery cells within the side rails and end plates. 2. The energy storage system of claim 1, wherein the battery cells are positioned between the plurality of end plates. 3. The energy storage system of claim 1, wherein the battery array has two end plates. 4. The energy storage system of claim 1, wherein the battery array has two side rails. 5. The energy storage system of claim 1, wherein the plurality of side rails comprise trusses. 6. The energy storage system of claim 5, wherein a mounting pin is also inserted through a compression limiter. 7. The energy storage system of claim 1, wherein the battery array further comprises: at least one battery retainer formed of an insulating material and disposed between two adjacent battery cells, the retainer having a sufficient thickness to limit thermal transfer between the adjacent battery cells to a level which prevents a first one of the adjacent battery cells from venting when a second one of the adjacent battery cells vents. 8. The energy storage system of claim 1, wherein the plate mounting flanges secure the end plates between the mounting pins and the battery cells. 9. The energy storage system of claim 1, wherein at least one of the plurality of side rails comprises a channel for securing the battery cells between opposing side rails. 10. The energy storage system of claim 1, further comprising: an upper rail flange and a lower rail flange, wherein the upper and lower rail flanges extend away from the side rails, wherein the battery cells are secured between the upper and lower rail flanges, and wherein the rail mounting holes pass through the flanges. 11. The energy storage system of claim 1, wherein an insulation liner is positioned between one or more of the side rails and at least one of the battery cells. 12. A battery array configured for a hybrid electric vehicle comprising: a plurality of parallel side rails, the side rails having rail mounting holes at each end of the side rails;a plurality of end plates positioned substantially perpendicular to the side rails, each plate having a plurality of plate mounting flanges; anda plurality of battery cells positioned along the side rails;wherein plate mounting flanges and rail mounting holes are located such that a mounting pin can be inserted through a rail mounting hole and adjacent a plate mounting flange to secure the battery cells within the side rails and end plates. 13. The battery array of claim 12, wherein the battery cells are positioned between the plurality of end plates. 14. The battery array of claim 12, wherein the battery cells are positioned between the plurality of side rails. 15. The battery array of claim 12, wherein the battery array has two end plates. 16. The battery array of claim 12, wherein the battery array has two side rails. 17. The battery array of claim 12, wherein the plurality of side rails comprise trusses. 18. The battery array of claim 17, wherein the mounting pin is also inserted through a compression limiter. 19. The battery array of claim 12, wherein the battery array further comprises: at least one battery retainer formed of an insulating material and disposed between two adjacent battery cells, the retainer having a sufficient thickness to limit thermal transfer between the adjacent battery cells to a level which prevents a first one of the adjacent battery cells from venting when a second one of the adjacent battery cells vents. 20. The battery array of claim 12, wherein the plate mounting flanges secure the end plates between the mounting pin and the battery cells. 21. The energy storage system of claim 1, wherein at least one of the plurality of side rails comprises a channel for securing the battery cells between opposing side rails. 22. The energy storage system of claim 1, further comprising: an upper rail flange and a lower rail flange, wherein the upper and lower rail flanges extend away from the side rails, wherein the battery cells are secured between the upper and lower rail flanges, and wherein the rail mounting holes pass through the flanges. 23. The battery array of claim 12, wherein an insulation liner is positioned between one or more of the side rails and at least one of the battery cells. 24. The battery array of claim 22, wherein the mounting pin extends through the upper and lower rail flanges and is perpendicular to the upper and lower rail flanges, and wherein the mounting pin is parallel to the end plates. 25. The battery array of claim 21, wherein the channel includes an upper and lower flange extending toward the plurality of battery cells, wherein the mounting pin extends through the upper and lower flanges and is parallel to the side rails, wherein the mounting pin is parallel to the end plates, and wherein the plurality of battery cells are parallel to the end plates.