Equipment shelf

1. An equipment shelf comprising:

at least one power supply unit (PSU) positioned in an upper region of the equipment shelf, wherein one PSU of the at least one PSU comprises:

a plurality of internal components;

a case surrounding the plurality of internal components; and

an internal fan positioned within the case and configured to cause cooling air to pass through the at least one PSU to cool the plurality of internal components;

at least one battery backup unit (BBU) positioned in a lower region of the equipment shelf; and

an airflow path extending through the equipment shelf between the upper region and the lower region;

wherein the airflow path separates the upper region of the equipment shelf from the lower region of the equipment shelf and thermally isolates the at least one PSU in the upper region from the at least one BBU in the lower region when air flows through the airflow path; and

wherein the case includes an air vent formed in a bottom surface thereof and positioned adjacently to the internal fan, whereby a portion of the cooling air is diverted to flow through the airflow path.

2. The equipment shelf of claim 1 , further comprising an enclosure including at least a first plate in the upper region and a second plate in the lower region.

3. The equipment shelf of claim 1 , wherein the airflow path is at least partially defined by the first plate and the second plate.

4. The equipment shelf of claim 1 , wherein the at least one PSU is coupled to the first plate; and

wherein the at least one BBU is coupled to the second plate.

5. The equipment shelf of claim 1 , wherein the first plate includes at least one opening to duct the diverted air from the at least one PSU into the airflow path.

6. A power shelf comprising:

an enclosure having a plurality of upper receptacles and a plurality of lower receptacles;

multiple power supply units (PSUs) positioned within the plurality of upper receptacles;

multiple battery back-up units (BBUs) positioned within the plurality of lower receptacles; and

an airflow region between the multiple PSUs and the multiple BBUs;

at least one fan coupled to the airflow region and configured to enable airflow through the airflow region; and

wherein the fan is positioned at an end of the power shelf and draws air into the airflow region from an opposite end of the power shelf.

7. The power shelf of claim 6 , wherein the airflow region is at least partially defined by upper surfaces of the plurality of lower receptacles and bottom surfaces of the plurality of upper receptacles.

8. The power shelf of claim 6 , wherein the enclosure includes an equal number of the upper receptacles and the lower receptacles.

9. The power shelf of claim 6 , wherein the airflow region comprises multiple channels, each channel corresponding to a pair of one of the multiple PSUs and one of the multiple BBUs.

10. The power shelf of claim 9 , wherein the multiple channels are substantially parallel and permit airflow through the shelf in the same direction.

11. A rack-mounted equipment shelf comprising:

an enclosure having at least one receptacle for housing electronic equipment, wherein the at least one receptacle includes multiple upper receptacles positioned in an upper region of the enclosure and multiple lower receptacles positioned in a lower region of the enclosure;

electronic equipment positioned within the multiple upper receptacles and within the multiple lower receptacles;

a channel coupled to the enclosure, wherein the channel is positioned between the upper region and the lower region;

at least one fan coupled to the channel to draw air through the channel, whereby the air drawn through the channel maintains the electronic equipment and/or the shelf at a desired temperature; and

one or more baffles positioned between the electronic equipment positioned within the multiple upper receptacles and a rear end of the enclosure, the one or more baffles configured to inhibit a mixing of a cooling air flowing through the electronic equipment positioned within the multiple upper receptacles with the air drawn through the channel.

12. The rack-mounted equipment shelf of claim 11 , wherein the electronic equipment includes at least one power supply unit (PSU).

13. The rack-mounted equipment shelf of claim 11 , wherein the electronic equipment includes at least one battery back-up unit (BBU).

14. The rack-mounted equipment shelf of claim 11 , wherein the channel is coupled to an upper surface of the enclosure.

15. The rack-mounted equipment shelf of claim 11 , wherein the channel is coupled to a lower surface of the enclosure.