Distributed energy storage system

1. A modular energy storage system within a vehicle, wherein the energy storage system comprises a plurality of discrete energy storage units which are movable within the vehicle and selectively securable in a variety of positions,

wherein the modular energy storage system includes a plurality of connection points within the vehicle for receiving and securing the plurality of discrete energy storage units,

wherein a number of the plurality of connection points exceeds a number of the plurality of discrete energy storage units, and

wherein the vehicle is an aircraft and at least a first subset of the plurality of connection points are distributed within the fuselage of the aircraft.

2. A modular energy storage system according to claim 1 , wherein the plurality of connection points are distributed along the roll axis of the aircraft.

3. A modular energy storage system according to claim 1 , wherein each of the plurality of connection points is connected to all systems of the vehicle requiring power from the modular energy storage system.

4. A modular energy storage system according to claim 1 , wherein the plurality of energy storage units comprises batteries.

5. A modular energy storage system according to claim 1 , wherein the discrete energy storage units are securable in a variety of longitudinal positions.

6. A modular energy storage system according to claim 1 , wherein the discrete energy storage units are securable in a variety of lateral positions.

7. A modular energy storage system according to claim 1 , wherein the discrete energy storage units are securable in a variety of vertical positions.

8. A modular energy storage system within a vehicle, wherein the energy storage system comprises a plurality of discrete energy storage units which are movable within the vehicle and selectively securable in a variety of positions,

wherein the modular energy storage system includes a plurality of connection points within the vehicle for receiving and securing the energy storage units,

wherein the vehicle is an aircraft and the plurality of connection points are distributed within the fuselage of the aircraft, and

wherein the vehicle is an aircraft and the plurality of connection points are distributed within the lifting surfaces of the aircraft.

9. A modular energy storage system according to claim 8 , wherein a number of the plurality of connection points exceeds a number of the plurality of energy storage units.

10. A modular energy storage system according to claim 8 , wherein the discrete energy storage units are securable in a variety of vertical positions.

11. A modular energy storage system according to claim 10 , wherein the plurality of connection points are distributed along the roll axis of the aircraft.

12. A modular energy storage system according to claim 11 , wherein the plurality of discrete energy storage units are securable in a variety of lateral positions.

13. A modular energy storage system comprising

an aircraft having a fuselage and wings coupled with the fuselage,

a plurality of discrete energy storage units which are movable within the aircraft and selectively securable in a variety of positions, the discrete energy storage units comprising batteries, and

a plurality of connection points fixed within the aircraft for receiving and securing the plurality of discrete energy storage units to the aircraft, the plurality of connection points being distributed along a roll axis of the aircraft within the fuselage and along the wings of the aircraft, and a number of the plurality of connection points exceeds a number of the plurality of discrete energy storage units,

wherein the plurality of discrete energy storage units are secured to the plurality of connection points to fix a position of the plurality of discrete energy storage units relative to the aircraft during flight of the aircraft.

14. A modular energy storage system according to claim 13 , wherein the plurality of discrete energy storage units are secured to the plurality of connection points to cause a centre of gravity of the aircraft when unloaded to be forward of a centre of lift of the aircraft.

15. A modular energy storage system according to claim 14 , wherein the plurality of connection points are located forward of the wings, aligned with the wings, and aft of the wings.

16. A modular energy storage system according to claim 13 , wherein the plurality of discrete energy storage units are securable in a variety of vertical positions.

17. A modular energy storage system according to claim 14 , wherein the plurality of discrete energy storage units are securable in a variety of longitudinal positions.

18. A modular energy storage system according to claim 15 , wherein the plurality of discrete energy storage units are securable in a variety of lateral positions.