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Electrochemical systems and methods of operating the systems are disclosed herein. In one embodiment, a method for operating an electrochemical system, comprises: forming hydrogen gas in an electrolysis cell, maintaining the hydrogen gas at a temperature sufficient to enable the filling of a hydroge

Electrochemical systems and methods of operating the systems are disclosed herein. In one embodiment, a method for operating an electrochemical system, comprises: forming hydrogen gas in an electrolysis cell, maintaining the hydrogen gas at a temperature sufficient to enable the filling of a hydrogen gas vessel at a rate that would fill a 5 kg vessel with the hydrogen gas in a period of time of less than or equal to about 10 minutes, and introducing the hydrogen gas to the hydrogen gas vessel.

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What is claimed is: 1. A method for filling a hydrogen gas vessel, comprising: passing hydrogen gas from a hydrogen gas source to a hydrogen gas vessel; and maintaining the hydrogen gas at a temperature sufficient to enable the filling of the hydrogen gas vessel with the hydrogen gas at a rate that

What is claimed is: 1. A method for filling a hydrogen gas vessel, comprising: passing hydrogen gas from a hydrogen gas source to a hydrogen gas vessel; and maintaining the hydrogen gas at a temperature sufficient to enable the filling of the hydrogen gas vessel with the hydrogen gas at a rate that would fill a vessel having a 5 kg capacity to a maximum volume capacity of the vessel, in a period of time of less than or equal to about 10 minutes. 2. The method of claim 1, wherein the period of time is less than or equal to about 5 minutes. 3. The method of claim 1, wherein the hydrogen gas is maintained at a temperature of about-10�� F. to about 40�� F. 4. The method of claim 1, further comprising monitoring at least one of a temperature and a pressure of the hydrogen gas vessel, and controlling the temperature based upon at least one of the monitored temperature and the monitored pressure. 5. A storage medium encoded with a machine readable computer program code, the code including instructions for causing a computer to implement a method for operating an electrochemical system, the method comprising: passing hydrogen gas from a hydrogen gas source to a hydrogen gas vessel; and maintaining the hydrogen gas at a temperature sufficient to enable the filling of the hydrogen gas vessel with the hydrogen gas at a rate that would fill a vessel having a 5 kg capacity to a maximum volume capacity of the vessel, in a period of time of less than or equal to about 10 minutes. 6. A computer data signal, the computer data signal, comprising: instructions for causing a computer to implement a method for operating an electrochemical system, the method comprising: passing hydrogen gas from a hydrogen gas source to a hydrogen gas vessel; and maintaining the hydrogen gas at a temperature sufficient to enable the filling of the hydrogen gas vessel with the hydrogen gas at a rate that would fill a vessel having a 5 kg capacity to a maximum volume capacity of the vessel, in a period of time of less than or equal to about 10 minutes. 7. A method for filling a hydrogen gas vessel, comprising: passing hydrogen gas from a hydrogen gas source to the hydrogen gas vessel; and controlling a temperature of the hydrogen gas to fill the vessel to its specification pressure and maximum volume capacity while maintaining a vessel pressure at less than or equal to the specification pressure. 8. The method of claim 7, further comprising filling the vessel in less than or equal to about 10 minutes. 9. The method of claim 8, further comprising filling the vessel in less than or equal to about 5 minutes. 10. The method of claim 7, wherein the temperature is above cryogenic temperatures. 11. The method of claim 7, wherein the hydrogen gas is controlled with a heat exchanger, and wherein the heat exchanger is selected from the group consisting essentially of a tube-in-tube heat exchanger, and a shell-in-tube heat exchanger. 12. The method of claim 1, wherein the temperature is above cryogenic temperatures. 13. The method of claim 1, wherein the hydrogen gas is maintained at the temperature with a heat exchanger, and wherein the heat exchanger is selected from the group consisting essentially of a tube-in-tube heat exchanger, and a shell-in-tube heat exchanger. 14. A method for filling a hydrogen gas vessel, comprising: passing hydrogen gas from a hydrogen gas source to a hydrogen gas vessel; and maintaining the hydrogen gas at a temperature of about-10�� F. to about 40�� F.; and filling the hydrogen gas vessel with the hydrogen gas at a rate that would fill a vessel having a 5 kg capacity, to a maximum volume capacity of the vessel, in a period of time of less than or equal to about 5 minutes. 15. The method of claim 14, wherein the hydrogen gas is maintained at the temperature with a heat exchanger, and wherein the heat exchanger is selected from the group consisting essentially of a tube-in-tube heat exchanger, and a shell-in-tube heat exchanger. 16. The method of claim 1, further comprising cooling the hydrogen gas prior to entering the hydrogen gas vessel. 17. The method of claim 16, wherein the hydrogen gas is maintained at a temperature of about-10�� F. to about 40�� F. 18. The method of claim 7, further comprising cooling the hydrogen gas prior to entering the hydrogen gas vessel. 19. The method of claim 18, wherein the hydrogen gas is maintained at a temperature of about-10�� F. to about 40�� F. 20. The method of claim 11, further comprising passing the hydrogen gas through the heat exchanger prior to the hydrogen gas entering the hydrogen gas vessel. 21. The method of claim 13, further comprising passing the hydrogen gas through the heat exchanger prior to the hydrogen gas entering the hydrogen gas vessel. 22. The method of claim 15, further comprising passing the hydrogen gas through the heat exchanger prior to the hydrogen gas entering the hydrogen gas vessel.