Portable power supply

Abstract

A portable power supply includes a housing, at least one battery cell, a charger, and an accessory. The housing defines a cavity. The housing includes an upper portion, a lower portion, a plurality of air inlets defined in the lower portion, and a plurality of air outlets defined in the upper portion. A plurality of air inlets are in fluid communication with the cavity. A plurality of air outlets are in fluid communication with the cavity. At least one battery cell is disposed in the cavity. The charger is electrically coupled with the battery cell. The accessory is coupled to the upper portion. The attachment is configured to at least partially cover each of the air outlets such that airflow exiting the air outlets passes through the circuitous path.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 282,477, filed November 23, 2021; U.S. Provisional Patent Application No. 63 / 304,336, filed January 28, 2022; and U.S. Provisional Patent Application No. 63 / 407,921, filed September 19, 2022, all of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to structures having a housing, and more specifically, to structures such as storage containers, battery storage containers, batteries, battery chargers, and power tools. Background Technology

[0004] Due to prolonged use, prolonged exposure to sunlight, and other factors, the internal temperature of a power supply will rise over time. When the temperature of the first entity is relatively lower than that of the second entity, combining the first and second entities will result in a temperature between the relatively lower temperature of the first entity and the relatively higher temperature of the second entity. Utility Model Content

[0005] In one aspect, this disclosure provides a portable power supply including a housing, at least one battery cell, a charger, and an accessory. The housing defines a cavity. The housing includes an upper portion, a lower portion, a plurality of air inlets defined in the lower portion, and a plurality of air outlets defined in the upper portion. The plurality of air inlets are in fluid communication with the cavity. The plurality of air outlets are in fluid communication with the cavity. At least one battery cell is disposed in the cavity. The charger is electrically coupled to the battery cell. The accessory is coupled to the upper portion. The accessory is configured to at least partially cover each air outlet, such that airflow exiting the air outlets follows a detour path.

[0006] In some aspects of portable power supplies, at least one of the plurality of air inlets is additionally configured as a drain outlet.

[0007] In some aspects of the portable power supply, the accessory includes at least one coupling interface, which is disposed on the surface of the accessory opposite to the upper portion.

[0008] In some aspects of portable power supplies, the vent faces upwards.

[0009] In some respects, the accessory includes a wall portion angled relative to an axis defined by and extending through an air outlet, thereby redirecting the airflow through the wall portion.

[0010] In some aspects, the attachment includes a downwardly depending sidewall. The downwardly depending sidewall defines a plurality of attachment outlet apertures such that the airflow redirected by the wall portion is configured to exit through the attachment outlet apertures.

[0011] In some aspects, the upper portion includes an upwardly extending ridge arranged proximate the air outlet.

[0012] In some aspects, the upper portion further includes a discharge channel, the ridge being arranged between the discharge channel and the air outlet.

[0013] In some aspects, the attachment includes a gap between the downwardly depending sidewall and the arm portion, the gap being in fluid communication with the discharge channel.

[0014] In some aspects, the discharge channel extends along at least a portion of an outer rim of the upper portion.

[0015] In some aspects, the upper portion further includes a plurality of discharge ports, and the discharge channel is in fluid communication with the discharge ports.

[0016] In some aspects, the charger is arranged in the cavity.

[0017] In another aspect, the present disclosure provides a portable power supply including a housing, a fan, at least one battery cell, and a charger. The housing includes an outer wall, an inner wall, and an airflow channel. The inner wall defines a cavity in the housing. The airflow channel is arranged between the outer wall and the inner wall. The fan is coupled to the housing. The fan is configured to force airflow through the airflow channel. The at least one battery cell is arranged in the cavity. The charger is electrically coupled with the battery cell.

[0018] In some aspects, the outer wall is coupled to the inner wall by a plurality of fasteners.

[0019] In some aspects, the fan is arranged between the inner wall and the outer wall.

[0020] In some aspects, an inlet of the airflow channel is formed in the portable power supply at a location opposite an outlet of the airflow channel so that airflow entering the inlet travels in a direction parallel to a direction in which airflow exits the outlet.

[0021] In some aspects, the airflow channel is arranged within a majority of an outer rim of a cross-section of the portable power supply.

[0022] In some aspects, the charger is arranged within the cavity.

[0023] In another aspect, the present disclosure provides a portable power supply comprising a housing, at least one battery cell, and a charger. The housing defines a cavity. The housing comprises an upper portion, a lower portion, a plurality of air inlets defined in the lower portion, and a plurality of air outlets defined in the upper portion. The plurality of air inlets are in fluid communication with the cavity. The plurality of air outlets are in fluid communication with the cavity. The plurality of air outlets are laterally open. The at least one battery cell is disposed in the cavity. The charger is electrically coupled with the battery cell.

[0024] In some aspects, a deflector is disposed in the cavity. The deflector is disposed in the cavity. The deflector and the upper portion cooperate to define a duct, the duct comprising a downwardly open portion. At least one of the plurality of air inlets is vertically aligned with the downwardly open portion.

[0025] In some aspects, the upper portion comprises an interface configured to receive a lower portion of a stacking interface.

[0026] In some aspects, the upper portion comprises one or more raised upper surfaces. The plurality of air outlets are laterally open between a top surface of the upper portion and the one or more raised upper surfaces.

[0027] In some aspects, the cavity is one of a plurality of cavities.

[0028] In some aspects, the portable power supply further comprises an accessory coupled to the upper portion. The accessory is configured to at least partially cover each air outlet such that airflow exiting the air outlet passes through a circuitous path.

[0029] In another aspect, the present disclosure provides a portable power supply comprising a housing, at least one battery cell, a charger, and a framework. The housing defines a cavity. The housing comprises an upper portion, a lower portion, and a plurality of vents. The plurality of vents are defined in the housing. The plurality of vents are configured to release hot air from within the cavity. The at least one battery cell is disposed in the cavity. The charger is electrically coupled with the battery cell. The framework extends around the housing. The framework at least partially covers the plurality of vents.

[0030] In some aspects, the framework is positioned at a distance from the plurality of vents.

[0031] In some aspects, the housing comprises a polymer. The housing comprises one or more weld lines. At least one of the weld lines extends along a direction transverse to at least one of the plurality of vents.

[0032] In some aspects, the housing further comprises a plurality of louvers defining the plurality of vents. At least one louver intersects a respective weld line.

[0033] In another aspect, the disclosure provides a portable power supply comprising a housing, a first subsystem, a first fan, a second subsystem, a second fan, and an airflow duct. The housing defines a cavity therein. The first subsystem is disposed within the cavity. The first subsystem dissipates heat. The first fan is configured to induce a first exhaust airflow in a first direction, thereby transferring heat away from the first subsystem in the first direction. The second subsystem is disposed within the cavity. The second subsystem dissipates heat. The second fan is configured to induce a second exhaust airflow in a second direction, thereby transferring heat away from the second subsystem. The airflow duct receives the first exhaust airflow and the second exhaust airflow. The airflow duct redirects the first exhaust airflow and the second exhaust airflow out of the housing.

[0034] In some aspects, the airflow duct comprises a partition that defines a first sub- channel and a second sub-channel within the airflow duct. The first sub-channel receives the first exhaust airflow, and the second sub-channel receives the second exhaust airflow.

[0035] In some aspects, one of the first fan and the second fan is integrally formed with the airflow duct.

[0036] In some aspects, the airflow duct is a first airflow duct, and the portable power supply further comprises a second airflow duct.

[0037] In some aspects, the first airflow duct receives a portion of the first exhaust airflow and a portion of the second exhaust airflow. The second airflow duct receives another portion of the first exhaust airflow and another portion of the second exhaust airflow.

[0038] In some aspects, the airflow duct comprises a plurality of exhaust holes for directing ambient intrusion flows out of the housing.

[0039] In some aspects, the first subsystem is a battery subsystem, and the second subsystem is a charger subsystem.

[0040] In some aspects, the housing comprises a mounting port for coupling the second subsystem to the housing. The airflow duct can be coupled to the same mounting port as the second subsystem.

[0041] In some aspects, the airflow duct redirects the first exhaust airflow out of the housing in a third direction, the airflow duct redirects the second exhaust airflow out of the housing in the third direction, and the third direction extends transversely to the first direction and the second direction.

[0042] In some aspects, the first direction is orthogonal to the second direction.

[0043] In another aspect, the present disclosure provides a portable power supply comprising a housing, a first subsystem, a second subsystem, and an airflow duct. The housing defines a cavity therein. The first subsystem is disposed within the cavity. The first subsystem dissipates heat. The second subsystem is disposed within the cavity. The second subsystem dissipates heat. The airflow duct comprises a channel defined therein and a baffle. The baffle extends through the channel such that the channel is divided into a first subchannel and a second subchannel. The first subchannel receives a first exhaust airflow that carries heat from the first subsystem. The second subchannel receives a second exhaust airflow that carries heat from the second subsystem.

[0044] In some aspects, the portable power supply further comprises a fan in fluid communication with the first subchannel.

[0045] In some aspects, the first subchannel is larger than the second subchannel.

[0046] In some aspects, the airflow duct further comprises a seal disposed on an edge of the airflow duct at a discharge outlet of the channel. The seal is formed of a thermoplastic elastomer overmolded to form an interference between the housing of the portable power supply and an outer housing of the airflow duct.

[0047] In another aspect, the present disclosure provides a portable power supply comprising a housing, a control system, a subsystem, and an airflow duct. The housing defines a cavity therein. The control system is disposed in the cavity and is configured to control operation of the portable power supply. The subsystem is sealed within the cavity. The subsystem dissipates heat. The airflow duct comprises a fan for drawing heat out of the housing and a thermistor for monitoring temperature within the cavity and the airflow duct. The thermistor is configured to communicate a temperature signal to the control system.

[0048] In some aspects, the thermistor is positioned downstream of the fan.

[0049] In some aspects, when the control system receives the temperature signal from the thermistor indicating that the ambient system temperature is outside of an operating temperature range of the portable power supply, the control system prevents operation of the portable power supply.

[0050] In some aspects, the airflow duct is a first airflow duct comprising a first fan and a first thermistor. The portable power supply further comprises a second airflow duct having a second fan and a second thermistor. When the control system receives the temperature signal from at least one of the first thermistor and the second thermistor indicating that the ambient system temperature is outside of an operating temperature range of the portable power supply, the control system prevents operation of the portable power supply.

[0051] Other features and aspects of the present application will become apparent from a review of the following detailed description and the associated drawings. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is a cross-sectional side view of the portable power supply.

[0053] Figure 2 is a perspective view of the portable power supply without accessories. Figure 1 is a perspective view of the portable power supply.

[0054] Figure 3 is a perspective view of the portable power supply. Figure 2 is a top view of the portable power supply.

[0055] Figure 4 is a perspective view of the portable power supply without accessories. Figure 1 is a perspective view of the "A" portion of the portable power supply.

[0056] Figure 5 is a perspective view of the portable power supply. Figure 1 is an exploded perspective view of the portable power supply.

[0057] Figure 6 is a perspective view of the portable power supply. Figure 5 is an enhanced side view of the portable power supply.

[0058] Figure 7 is a perspective view of the portable power supply. Figure 1 is a top view of the portable power supply.

[0059] Figure 8 is a perspective view of the portable power supply. Figure 1 is a side view of the "A" portion of the portable power supply.

[0060] Figure 9 is a perspective view of the "A" portion of the portable power supply. Figure 1

[0061] is a cross-sectional view of the portable power supply. Figure 10

[0062] is a cross-sectional view of the portable power supply. Figure 11 Figure 10 is a cross-sectional view of the portable power supply.

[0063] Figure 12 is a top view of the portable power supply.

[0064] Figure 13 is a cross-sectional view of the portable power supply. Figure 12

[0065] is a top view of the portable power supply. Figure 14 Figure 12 is a top view of the portable power supply.

[0066] ​​Figure 15 is Figure 12 Perspective view of an accessory and stackable interface for a portable power supply.

[0067] Figure 16 is Figure 15 an accessory and stackable interface for a portable power supply and Figure 12 perspective view of a portable power supply.

[0068] Figure 17 is Figure 12 cutaway view of a portable power supply.

[0069] Figure 18 is Figure 1 , Figure 10 and Figure 12 cross-sectional side view of a portable power supply according to any of the embodiments of

[0070] Figure 19 is Figure 1 perspective view of a portable power supply.

[0071] Figure 20 is Figure 1 side cutaway view of a portable power supply.

[0072] Figure 21 is a schematic view of a portable power supply according to Figure 1 , Figure 10 and Figure 12 any of the embodiments of

[0073] Figure 22 is another schematic view of a portable power supply according to Figure 1 , Figure 10 and Figure 12 any of the embodiments of

[0074] Figure 23 is a schematic view of a portable power supply according to another embodiment of the disclosure.

[0075] Figure 24 is a perspective view of a combined air duct for Figure 23 a portable power supply.

[0076] Figure 25 is Figure 23 another schematic view of a portable power supply.

[0077] Figure 26 is another perspective view of a combined air duct for Figure 24 a portable power supply.

[0078] Figure 27 schematic view of a portable power supply according to Figure 23Installation of a combined air duct for a portable power supply.

[0079] Figure 28 A schematic view illustrates a portable power supply Figure 23 Installation of a combined air duct and subsystem for a portable power supply.

[0080] Figure 29 is Figure 23 Perspective view of a portion of a portable power supply.

[0081] Figure 30 is a portable power supply Figure 23 Perspective view of a subsystem of a portable power supply.

[0082] Figure 31 is a graphical illustration of performance of a portable power supply. DETAILED DESCRIPTION

[0083] Figures 1-2 A portable power supply 5 is shown with a battery 10, a charger 15, an inverter 20, a housing 25, wherein the housing 25 defines a cavity 28 within an interior of the housing 25 such that the battery 10, charger 15, and inverter 20 are disposed within the cavity 28. The housing 25 further includes a lower portion 35, an upper portion 40, a plurality of air inlets 45 defined in the lower portion 35, and a plurality of air outlets 50 defined in the upper portion. The plurality of air inlets 45 are in fluid communication with the cavity 28. The plurality of air outlets 50 are in fluid communication with the cavity 28 such that the plurality of air inlets 45 and the plurality of air outlets are in fluid communication with each other. The portable power supply 5 further includes a user interface 55 and an accessory 60. In the illustrated embodiment, the accessory 60 is a charging pad configured to electrically engage with a chargeable object, such as a battery, as will be discussed in detail below. The accessory 60 is coupled to the upper portion 40 and is configured to at least partially cover each of the plurality of air outlets 50 such that air flow exiting the plurality of air outlets 50 travels a circuitous path. In other embodiments, any one of the battery 10, charger 15, and inverter 20 can be positioned outside of the cavity 28. In further embodiments, the portable power supply 5 can only have one or any combination of the battery 10, charger 15, and inverter.

[0084] In this specific embodiment, the battery 10 can have any chemical composition suitable for storing and providing electricity or energy. For example, the battery 10 can be composed of lithium-ion (Li-ion), nickel-cadmium (Ni-Cad), or other suitable chemical compositions. The charger 15 is positioned within the cavity 28 adjacent to the battery 10 so that the battery 10 can be electrically connected to the charger 15. In some embodiments, the charger 15 can be positioned outside the cavity 28. The charger 15, in conjunction with an external power supply tool, is configured to charge the battery 10. The battery 10 can output power to the inverter 20 via direct current (DC). The inverter 20 converts the DC power supplied by the battery 10 into alternating current (AC), thereby configuring the portable power supply 5 to provide or output AC power. In this way, the portable power supply 5 can function in a non-limiting manner substantially similar to a wall socket. In some embodiments, the portable power supply 5 may not include the inverter 20. In such embodiments, the battery 10 is a battery pack comprising one or more battery cells and configured to provide power to power tools, etc.

[0085] The housing 25 is surrounded by a frame 65, which includes a plurality of strip-shaped members 70. In the illustrated embodiment, the frame 65 is arranged such that it surrounds the periphery of the portable power supply 5. That is, the frame 65 is provided on each side of the portable power supply 5. Thus, when the portable power supply 5 is in a position such as Figure 2 In the upright position shown, the frame 65 provides support for the portable power supply 5. If the portable power supply 5 is in the upright position... Figure 2 The upright position shown is tilted over, and the frame is also configured to support the portable power supply 5. The frame 65 further includes a handle portion 75. The handle portion 75 is configured for a user to grip for transporting the portable power supply 5, but may also be used for other functions. In some embodiments, the frame 65 may be metallic. In other embodiments, the frame 65 may not be formed as a single entity, so that the frame 65 includes separate, independent components positioned around the housing 25 in any orientation. In a further embodiment, the portable power supply 5 may be without the frame 65.

[0086] like Figures 19-20 As shown, the portion of the frame 65 covering the bottom of the portable power supply 5 is advantageously positioned adjacent to a vent 80, which is defined within the housing 25 of the portable power supply 5. In the illustrated embodiment, the housing 25 includes a louver 81 disposed at a corner of the lower portion 35 of the housing 25. The louver 81 defines the vent 80. Compared to the remainder of the housing 25, the louver 81 may be structurally more fragile and more prone to breakage. The vent 80 is configured to release air from... Figure 1Warm or hot air within cavity 28. The frame 65 is positioned such that it at least partially blocks external objects (e.g., [missing information]) from directly impacting the louver 81. Figures 19-20 (as shown by ball 82). In some embodiments, the frame 65 can be positioned at a distance from the veil 81. That is, the frame 65 can be positioned so that the frame 65 does not directly contact the veil 81. Without the frame 65, ball 82 or another similar object would directly impact the veil 81, potentially causing it to break. Therefore, the bottom portion of the frame 65 enhances the protection and durability of the veil 81 and the vent 80.

[0087] In addition, refer to Figure 20 The welding lines (e.g., stitching lines) 84 for the housing 25 are advantageously positioned adjacent to and under the cover of the bottom portion of the frame 65. The welding lines 84 extend in a direction transverse to the opening of at least one corresponding vent 80. Thus, each welding line 84 can intersect at least one corresponding louver 81. Compared to other areas of the plastic mold, the material strength of the welding lines 84 within the plastic mold is relatively low, making them more susceptible to breakage. By placing the welding lines 84 under the cover of the frame 65, the risk of breakage can be reduced, thereby improving the durability and service life of the portable power supply 5. Figures 19-20 In this configuration, when the frame 65 covers the vent 80 and welding line 84 on the lower portion 35 of the portable power supply 5, the frame 65 may additionally cover vent 80 and welding line 84 located elsewhere on the portable power supply 5.

[0088] Reference Figure 2 In the illustrated embodiment, the lower portion 35 of the housing 25 is formed of a solid material, such as, but not limited to, plastic (e.g., polymer). In some embodiments, the lower portion 35 may be formed of a different material. The lower portion 35 includes a plurality of external channels 85 positioned between a plurality of external ridges 90. At least one of the plurality of strips 70 (e.g., a portion of the frame 65) is positioned within a corresponding channel of the plurality of external channels 85. In the illustrated embodiment, a handle portion 75 is positioned on the front side of the lower portion 35, adjacent to the lower portion 35. In other embodiments, the lower portion 35 may not include the plurality of external channels 85 and / or the plurality of external ridges 90. In a further embodiment, the frame 65 may not include portions positioned within corresponding channels of the plurality of external channels 85. In yet another further embodiment, the handle portion 75 may be positioned elsewhere on the portable power supply 5.

[0089] Reference Figures 2-4In the illustrated embodiment, the upper portion 40 of the housing 25 is formed of a solid material, such as but not limited to plastic. The upper portion 40 is configured to be coupled to and positioned above the lower portion 35. The user interface 55 is disposed on the upper portion 40. In some embodiments, the user interface 55 can be positioned elsewhere on the portable power supply 5. The surface 95 (e.g., top surface) of the upper portion 40 includes an accessory receiving portion 100. The accessory receiving portion 100 is generally square shaped and includes a first set of wall portions 105 and a second set of wall portions 110 that define a plurality of vents 115. Each wall portion of the first set of wall portions 105 includes a first vertical portion 120, an angled portion 125, and a second vertical portion 130. Each wall portion of the first set of wall portions 105 is positioned opposite another wall portion of the first set of wall portions 105. Each wall portion of the second set of wall portions 110 is positioned opposite another wall portion of the second set of wall portions 110. In the illustrated embodiment, the first set of wall portions 105 includes two wall portions and the second set of wall portions 110 includes two wall portions, such that the accessory receiving portion 100 forms a square shape. As such, each wall portion of the first set of wall portions 105 is adjacent to two wall portions of the second set of wall portions 110, and each wall portion of the second set of wall portions 110 is adjacent to two wall portions of the first set of wall portions 105. In other embodiments, the accessory receiving portion 100 can be positioned elsewhere on the portable power supply 5. In further embodiments, the accessory receiving portion 100 can be formed in a shape that is generally different from a square, such that the accessory receiving portion 100 can include more, fewer, or the same number of wall portions. In still further embodiments, the accessory receiving portion 100 can be devoid of any wall portions. In any of the above embodiments, the lower portion 35 and the upper portion 40 can form a continuous structure.

[0090] Returning to Figures 1-2 In the illustrated embodiment, the plurality of air inlets 45 are positioned at and defined in the bottom of the lower portion 35 and are in fluid communication with the cavity 28. In other embodiments, the plurality of air inlets 45 can be positioned elsewhere on the portable power supply 5, such as the sides of the portable power supply 5. The plurality of air inlets 45 are configured to allow air flow into the cavity 28. The air flow into the plurality of air inlets 45 is relatively cooler in temperature than the air in the entire cavity 28. The incoming air flow can then act on the battery 10, the charger 15, and the inverter 20 to cool the battery 10, the charger 15, and the inverter 20. In the illustrated embodiment, at least one of the plurality of air inlets 45 can also be configured as a drain for the portable power supply 5. That is, the air inlet 45 can be configured to receive condensation that is generated within the cavity 28 of the portable power supply 5 and further configured to provide an outlet for the condensation to exit the cavity 28 of the portable power supply 5.

[0091] Referring to Figures 3-4 , a plurality of air outlets 50 are positioned at and defined in the upper portion 40 of the portable power supply 5. The plurality of air outlets 50 are in fluid communication with the cavity 28 Figure 1 ) and the plurality of air inlets 45. In the illustrated embodiment, the plurality of air outlets 50 are positioned adjacent to and partially formed in the first set of wall portions 105. The plurality of air outlets 50 define outlet axes that extend through the plurality of air outlets 50. The openings into each of the plurality of air outlets 50 face upward. That is, the openings into each of the plurality of air outlets 50 are defined in the top surface 95 of the upper portion 40 and face away from the upper portion 40. The upper portion 40 further includes a drain channel 135 formed in the upper portion 40 of the housing 25 such that the first set of wall portions 105 are positioned between the drain channel 135 and the plurality of air outlets 50. The drain channel 135 extends along at least a portion of the outer edge of the upper portion 40 of the housing. The drain channel 135 is in fluid communication with the second set of wall portions 110. More specifically, the drain channel 135 is in fluid communication with the plurality of drain ports 115. The drain channel 135 is sloped such that portions of the drain channel 135 closer to the second set of wall portions 110 (and thus also closer to the plurality of drain ports 115) are relatively lower than portions of the drain channel 135 further from the second set of wall portions 110 (and thus also further from the plurality of drain ports 115).

[0092] In some embodiments, the plurality of air outlets 50 can be positioned elsewhere in the upper portion 40. In other embodiments, the upper portion 40 can not include a drain channel 135 or the drain channel 135 can have a configuration other than the sloped configuration of the illustrated embodiment. In still further embodiments, the drain channel 135 can extend in an orientation and direction other than the illustrated embodiment.

[0093] Referring to Figure 2 , in the illustrated embodiment, the user interface 55 includes a plurality of user operation screens 140. The user operation screens 140 can provide information to the user, such as but not limited to the battery life of the portable power supply 5, the internal temperature of the portable power supply 5, and / or the power output of the portable power supply 5. The user interface 55 can further be configured to allow the user to turn the portable power supply 5 on and off. The user interface can further be configured to allow an external power tool to interface with the charger 15. That is, the user interface 55 can include a port configured to receive an external power tool. In the illustrated embodiment, the user interface 55 is positioned on the surface of the upper portion 40 directly above the handle portion 75.

[0094] Referring toFigures 5-8 The accessory 60 is configured to be coupled to the portable power supply 5 at the accessory receiving portion 100. A plurality of fasteners 145 are configured to fasten the accessory 60 to the portable power supply 5. In the illustrated embodiment, the fasteners 145 extend from a location within the upper portion 40 of the housing 25, through the accessory receiving portion 100, and into a plurality of fastener receiving holes 150 formed in the accessory 60. In other words, the plurality of fasteners 145 extend upward through the accessory receiving portion 100 and into the plurality of fastener receiving holes 150 in the accessory 60. In this manner, the accessory 60 is coupled to the portable power supply 5 such that the plurality of fasteners 145 are inaccessible from an external location of the portable power supply 5. When coupled, the accessory 60 substantially covers the accessory receiving portion 100. In the present embodiment, the fasteners 145 are screws. In other embodiments, the accessory 60 can be coupled to the accessory receiving portion 100 by different fastening means such that the fasteners 145 are accessible to a user.

[0095] Referring to Figure 5 and Figure 7 The accessory 60 includes at least one coupling interface 155 formed on a surface of the accessory 60 opposite the upper portion 40. In the illustrated embodiment, the accessory 60 includes ten coupling interfaces 155. More specifically, the accessory 60 includes eight generally square-shaped coupling interfaces 155a and two generally rectangular-shaped coupling interfaces 155b. In other embodiments, the accessory 60 can include more or less coupling interfaces 155 of different shapes and sizes. The inverter 20 Figure 1 is configured to transmit alternating current to the accessory 60 such that the accessory 60 is configured to be powered at the coupling interfaces 155. The accessory 60 can be configured to be powered at one or more of the coupling interfaces 155 at a time.

[0096] Referring to Figures 8-9The attachment 60 further includes a wall 160 disposed about the periphery of the attachment 60. The wall 160 extends transverse to the outlet axis such that the wall 160 is configured to redirect the airflow flowing through the plurality of air outlets 50. The attachment 60 further includes downwardly depending side walls 165 extending from the wall 160. The downwardly depending side walls 165 define a plurality of attachment air outlets 170. When the attachment 60 is coupled to the upper portion 40 of the housing 25, the downwardly depending side walls 165 are positioned above the first vertical portions 120 of the first set of wall portions 105 of the upper portion 40. In this manner, a gap 175 is defined between the inner surface of each downwardly depending side wall 165, the wall 160, the first vertical portions 120 of the first set of wall portions 105, the angled portions 125 of the first set of wall portions 105, and the second vertical portions 130 of the first set of wall portions 105 such that the gap 175 is in fluid communication with the drain channel 135. In other embodiments, the attachment 60 can include components that are different in shape, structure, and size and placed at different angles than the illustrated embodiment.

[0097] Returning to Figure 1 In operation of the portable power supply 5, the portable power supply 5 can be cooled when relatively cool ambient air enters the portable power supply 5 through the plurality of air inlets 45. The relatively cool air rises through the cavity 28, cooling the battery 10, the charger 15, and the inverter 20. Warm air expelled or released by any of the battery 10, the charger 15, and the inverter 20 can rise to the plurality of air outlets 50. Referring to Figures 8-9 The wall 160 on the attachment 60 redirects the warm airflow to the downwardly depending side walls 165. The warm airflow can then exit the portable power supply 5 via the plurality of attachment air outlets 170, thereby reducing the internal temperature, or cooling, the portable power supply 5. Any moisture (e.g., condensation) formed within the cavity 28 Figure 1 may exit the cavity 28 through the plurality of air inlets (e.g., drain ports) 45. Figure 1Furthermore, as the warm airflow exits the portable power supply 5, any moisture (e.g., condensation) formed in the plurality of air outlets 50 is guided through the downward-hanging sidewalls 165, the second vertical portion 130, the inclined portion 125, and the first vertical portion to the discharge channel 135. The moisture can then travel along the discharge channel 135 until it reaches the second set of wall portions 110, more specifically, the plurality of discharge outlets 115, and exits the portable power supply 5. Airflow and moisture can enter, flow through, and / or exit the portable power supply 5 with any alternative features relative to the previously disclosed embodiments. In a further embodiment, the portable power supply 5 may include a fan (not shown) for active airflow cooling through vents (not shown). In such an embodiment, the portable power supply 5 may be cooled entirely by the passive airflow described above, entirely by the active airflow provided by the fan, or by a combination of passive and active airflow.

[0098] Figures 10-11 A portable power supply 205 according to another specific embodiment of the present disclosure is shown. Figures 10-11 The portable power supply 205 can be used with Figures 1-9 The portable power supply is basically similar to the 5, except for the following differences. Figure 10 As shown, the portable power supply 205 includes a housing 225 having an outer wall 230, an inner wall 235, and an airflow passage 240 defined between the outer wall 230 and the inner wall 235 for coupling a fan 242 to the housing 225. The fan 242 is configured to induce airflow through the airflow passage 240. In the illustrated embodiment, the fan 242 is positioned outside the housing 225 and coupled to it. In other embodiments, the fan 242 may be arranged between the outer wall 230 and the inner wall 235.

[0099] Figure 10A cross-section of the portable power supply 205 is shown. In the illustrated implementation, a plurality of fasteners 245 couple the outer wall 230 to the inner wall 235 such that the outer wall 230 is adjacent to, but not in contact with, the inner wall 235. Each of the plurality of fasteners 245 extends through a corresponding one of a plurality of bumpers 250 that extend between the outer wall 230 and the inner wall 235. The portable power supply 205 includes an inlet 255 to the airflow channel 240 on a first side 260 of the portable power supply 205, and an outlet 270 of the airflow channel 240 positioned on a second side 265 opposite the first side 260. In other words, the inlet 255 of the airflow channel 240 is opposite the outlet 270 of the airflow channel 240 such that the direction of airflow into the portable power supply 205 is parallel to the direction of airflow out of the portable power supply 205. The airflow channel 240 is disposed in a majority of the outer perimeter of the cross-section of the portable power supply 205. In other words, the airflow channel 240 traverses at least 50% or 50% of the outer perimeter of the cross-section of the portable power supply 205. Airflow enters the inlet 255 positioned on the first side 260 of the portable power supply 205 through the airflow channel 240 and travels upward to the top side 275 of the portable power supply 205. Subsequently, the airflow travels from the first side 260, through the top side 275, to the second side 265 of the portable power supply 205, and travels downward to the outlet 270 of the airflow channel 240 such that the airflow channel 240 covers about 75% of the outer perimeter of the cross-section of the portable power supply 205.

[0100] In some implementations, the outer wall 230 can be coupled to the inner wall 235 by another coupling means, such as, but not limited to, welding. In other implementations, the outer wall 230 and the inner wall 235 can be a single entity such that a second cavity is defined therein through which the airflow channel 240 passes. In further implementations, the inlet 255 of the airflow channel 240 can be positioned elsewhere on the portable power supply 205, such as, but not limited to, the top or the bottom, wherein the airflow entering the inlet 255 of the airflow channel 240 can be parallel to the airflow exiting the outlet 270 of the airflow channel 240 or can not be parallel to the airflow exiting the outlet 270 of the airflow channel 240. In still further implementations, the fan 242 Figure 11 ) can be internal or external to the portable power supply 205 and configured to induce airflow through the airflow channel 240.

[0101] Referring to Figure 11The outer wall 230 has an outer surface 230a facing away from the portable power supply 205 and an inner surface 230b facing toward the portable power supply 205. The outer wall 230 is made of a plastic material having a low thermal conductivity and a low thermal diffusivity. The outer surface 230a has a high total solar reflectance. The high total solar reflectance results in a low ratio of absorptivity to emissivity of the outer surface 230a. Alternatively, the outer surface 230a can be opaque in some embodiments. In such embodiments, the high total reflectance results in a low ratio of one minus reflectivity to emissivity of the outer surface 230a. The inner surface 230b has a low emissivity.

[0102] The inner wall 235 has an outer surface 235a facing away from the portable power supply 205 and toward the outer wall 230. The inner wall 235 is made of a plastic material having a low thermal conductivity and a low thermal diffusivity. In some embodiments, the outer surface 235a has a high total solar reflectance. The high total solar reflectance results in a low ratio of absorptivity to emissivity of the outer surface 235a. In other embodiments, the outer surface 235a is not directly exposed to solar radiation and thus can not require a high total solar reflectance. Alternatively, the outer surface 235a can be opaque in some embodiments. In such embodiments, the high total reflectance results in a low ratio of one minus reflectivity to emissivity of the outer surface 235a. In some embodiments, the outer wall 230 and the inner wall 235 can be made of the same plastic material so that the outer wall 230 and the inner wall 235 have the same relatively low thermal conductivity and thermal diffusivity. Further, the outer surface 230a of the outer wall 230 and the outer surface 235a of the inner wall 235 can have the same surface properties so that the two outer surfaces 230a, 235a have the same relatively high total reflectance. In other embodiments, the outer wall 230 and the inner wall 235 can be made of different plastic materials so that one of the outer wall 230 and the inner wall 235 has a relatively high thermal conductivity or a relatively high thermal diffusivity than the other of the outer wall 230 and the inner wall 235 or both a relatively high thermal conductivity and a relatively high thermal diffusivity than the other of the outer wall 230 and the inner wall 235. In such embodiments, the outer surface 230a, 235a of one of the outer wall 230 and the inner wall 235 can have a relatively low total solar reflectance than the other of the outer surface 230a, 235a.

[0103] Figures 12-17 A portable power supply 405 according to another embodiment of the disclosure is shown. The portable power supply 405 can be similar to the portable power supply 5 of FIG. 1 and the portable power supply 405 of FIG. 2, except that the portable power supply 405 includes a thermal management system 410 that is different from the thermal management system 110 of FIG. 1 and the thermal management system 210 of FIG. 2. Figures 1-9 the portable power supply 5 of FIG. 1 and the portable power supply 405 of FIG. 3, except that the portable power supply 505 includes a thermal management system 510 that is different from the thermal management system 110 of FIG. 1, the thermal management system 210 of FIG. 2, and the thermal management system 410 of FIG. 3.Figures 10-11 The portable power supply 205 is substantially similar, but for the following differences. As shown in Figure 12 and Figure 13 , although the air intake and cavity are not shown in Figure 12 , the portable power supply 405 includes a housing 425 having, for example, a plurality of air intakes such as the air intake 45 in Figure 1 in fluid communication with a cavity such as the cavity 28 in Figure 1 . The housing 425 further includes a plurality of air outlets 450 in fluid communication with the cavity. The plurality of air outlets 450 open laterally between an upper surface 455 and a raised upper surface 460, both of which are positioned on an upper portion 440 of the housing 425. The raised upper surface 460 can be one of a plurality of raised upper surfaces 460. In the illustrated embodiment, there are two raised upper surfaces 460a, 460b. Some of the plurality of air outlets 450 can be outward from the center of the portable power supply 405. Others of the plurality of air outlets 450 can be toward the center of the portable power supply 405.

[0104] Referring to Figure 12 and Figure 15 , the upper portion 440 includes an interface 465 configured to receive an accessory stack interface 470. In the illustrated embodiment, the stack interface 470 is a tool box having a charging inlet. In other embodiments, the stack interface 470 can be another chargeable structure. In the illustrated embodiment, the interface 465 includes the upper surface 455, the raised upper surfaces 460a, 460b, and a plurality of latches 475. The stack interface 470 can be seated on top of the upper surface 455 and one or both of the raised upper surfaces 460a, 460b and secured in place by the plurality of latches 475. A handle 480 is disposed within the upper surface 455 between the two raised upper surfaces 460a, 460b. When the stack interface 470 is coupled to the portable power supply 405, the stack interface 470 covers the handle 480. The portable power supply 405 further includes auxiliary handles 485a, 485b disposed on respective sides of the portable power supply 405 for use when the handle 480 is covered by the stack interface 470.

[0105] Referring again to Figure 13 , the stack interface 470 is positioned on top of the raised upper surface 460 such that, in the illustrated embodiment, there is a space 490 between the stack interface 470 and the upper surface 455. The space 490 defines a height H, and the height H is equal to the distance between the raised upper surfaces 460a, 460b and the upper surface 455. The plurality of air outlets 450 open laterally so as to be in fluid communication with the cavity when air flow is through the portable power supply 405.Figures 1-9 The portable power supply 5 similarly redirects airflow. More specifically, the airflow is configured to enter the portable power supply 405 substantially similarly to the portable power supply 5 in Figures 1-9 and is configured to cool the internal components of the portable power supply 405 (e.g. Figure 1 the battery 10, the charger 15, and the inverter 20 in ). The warm air released by the internal components of the portable power supply 405 rises to the laterally open plurality of air outlets 450, such that the vertically rising air is redirected horizontally by the raised upper surface 460 and the stacking interface 470 to exit the plurality of air outlets 450 and cool the portable power supply 405.

[0106] In some implementations, as shown in Figure 14 and 15 the portable power supply 405 is configured to receive an accessory 500 substantially similar to the accessory 60 in Figure 5 The accessory 500 can be mounted to the raised upper surfaces 460a, 460b, such that the plurality of air outlets 450 are laterally open between the upper surface 455 and the accessory 500. As shown in Figure 15 and Figure 16 the accessory 500 includes a plurality of latches 502 for coupling and securing the stacking interface 470. Although Figure 15 and Figure 16 are not shown, the accessory 500 of the illustrated implementation includes a plurality of coupling interfaces substantially similar to the plurality of coupling interfaces 155 in Figure 7 The plurality of coupling interfaces are positioned on a surface of the accessory 500 opposite or facing away from the upper portion 440. The plurality of coupling interfaces are configured to engage the stacking interface 470 or another similar structure to provide power thereto.

[0107] Figure 17 A cross-sectional view of one of the plurality of air outlets 450 is shown. The upper surface 455 includes a first set of wall portions, or upwardly extending ridges 505, positioned adjacent to a corresponding air outlet of the plurality of air outlets 450. The upwardly extending ridges 505 include a first vertical portion 520, a sloped portion 525, and a second vertical portion 530. The accessory 500 includes an upper wall portion 560 angled with respect to an outlet axis b defined by and extending through the plurality of air outlets 450, such that the upper wall portion 560 redirects the airflow. A downwardly overhanging side wall 565 extends from the upper wall portion 560 and includes a plurality of accessory outlets 570, through which the airflow is configured to exit the portable power supply 405.

[0108] Referring to Figure 18, any of the specific embodiments of the previously disclosed portable power supplies 5, 205, 405 Figure 1 , Figure 10 and Figure 12 ) can include a deflector 600. While each of the portable power supplies 5, 205, 405 Figure 1 , Figure 10 and Figure 12 ) can include a deflector 600, for the sake of brevity, the deflector 600 is described only with respect to the portable power supply 5 in Figure 1 . The description of the deflector is equally applicable to the portable power supplies 205, 405 of Figure 10 and Figure 12 . As shown in Figure 18 , the portable power supply 5 is arranged in the cavity 28 such that the deflector 600 and the upper portion 40 Figure 2 ) cooperate to define a duct 605. The duct 605 includes a downwardly open portion 610 positioned over at least one of the plurality of air inlets 45. The duct 605 is configured to receive liquid from outside the portable power supply 5 and direct the liquid along the deflector 600 to the downwardly open portion 610. The liquid then travels downwardly under the force of gravity to at least one of the plurality of air inlets 45 that is vertically aligned with the downwardly open portion 610. The at least one of the plurality of air inlets 45 then provides a liquid exit for the liquid to exit the portable power supply 5 through the at least one of the plurality of air inlets 45.

[0109] Each of the specific embodiments of the portable power supplies 5, 205, 405 can be exposed to outdoor conditions such as, but not limited to, rain, dust, mud, and sunlight. Accordingly, the portable power supplies 5, 205, 405 can advantageously be provided with features to resist the aforementioned outdoor conditions.

[0110] In each of the specific embodiments of the portable power supplies 5, 205, 405, the portable power supplies 5, 205, 405 can include sealed subsystems 615, 620. For example, in Figure 21 and Figure 22In the illustrated embodiment, the portable power supply 5, 205, 405 can include a battery subsystem 615 and a charger subsystem 620 that are sealed from the rest of the portable power supply 5, 205, 405. The sealed subsystems 615, 620 can prevent outdoor elements from entering the subsystems 615, 620 of the portable power supply 5, 205, 405 and moving between the subsystems. The subsystems 615, 620 of the portable power supply 5, 205, 405 can be sealed by any common form of sealant, such as, but not limited to, water-based latex sealant, acrylic sealant, and silicone sealant. Thus, the sealant enhances ingress protection without taking up much space and, as a result, can prevent environmental ingress without substantially increasing the size of the portable power supply 5, 205, 405. Moreover, sealing the subsystems 615, 620 of the portable power supply 5, 205, 405 from each other can advantageously increase the thermal resistance of the portable power supply 5, 205, 405.

[0111] In another embodiment of the portable power supply 5, 205, 405, each subsystem 615, 620 (e.g., battery, charger, inverter) of the portable power supply 5, 205, 405 can be fully rated according to a system-level ingress protection code (i.e., IP code) and / or Underwriter's Laboratories Rating. For example, the subsystems 615, 620 of the portable power supply 5, 205, 405 can be manufactured to have a solid IP code of 6 and a liquid IP code of 9k. With a solid IP code of 6, the subsystems 615, 620 of the portable power supply 5, 205, 405 can be protected from dust ingress for at least 8 hours in close contact with dust and other debris. With a liquid IP code of 9k, the subsystems 615, 620 of the portable power supply 5, 205, 405 can withstand high pressure, high temperature water jet / spray at close range. By fully rating the subsystems 615, 620 of the portable power supply 5, 205, 405, ingress protection can be specifically defined for smaller systems, thereby improving ease of manufacturing. Fully rating each subsystem 615, 620 can also provide better ingress protection against external harm than merely sealing the subsystems 615, 620. That is, the housing 25 and the framework 65 can protect the subsystems 615, 620 from external harm. Thus, the ingress protection can be less likely to be broken or compromised than the embodiment of the portable power supply 5, 205, 405 that merely seals the subsystems.

[0112] One problem that can arise from individually fully rating each subsystem 615, 620 is that airflow and thermal performance can be more difficult to manage when each subsystem 615, 620 is fully rated. For example, as shown in FIGS. 6A and 6B, the battery subsystem 615 can utilize airflow Al above the battery subsystem 615 end face 625 to accelerate heat dissipation, while the charger subsystem 620 can utilize a dedicated impingement airflow A2 from the fan 630 and through the center of the charger subsystem 620 to accelerate heat dissipation. As such, the ideal airflow out paths for the battery subsystem 615 and the charger subsystem 620 can be set orthogonal to each other, which can reduce the overall heat dissipation efficiency of the portable power supply 5, 205, 405. Figure 21 and Figure 22 As such, the ideal airflow out paths for the battery subsystem 615 and the charger subsystem 620 can be set orthogonal to each other, which can reduce the overall heat dissipation efficiency of the portable power supply 5, 205, 405.

[0113] Figure 23 Another embodiment of a portable power supply 805 is shown. The portable power supply 805 can include all of the features described herein for the previous embodiments of the portable power supply 5, 205, 405, as well as the additional features described below. To alleviate thermal management and performance issues, while avoiding unnecessarily increasing the size of the portable power supply 805, the portable power supply 805 can be provided with combined air ducts 810 configured to pass heat from the battery subsystem 812 (first subsystem) and the charger subsystem 815 (second subsystem) out of the housing 820 of the portable power supply 805 in the same direction as each other. In the embodiment shown, the portable power supply 805 includes two combined air ducts 810. The battery subsystem 812 and the charger subsystem 815 are both disposed within a cavity defined by the housing 820. The portable power supply 805 can additionally be provided with a control system 822, such as a processor, control board, or another similar control unit, disposed within the cavity defined by the housing 820 and configured to control operation of the portable power supply 805.

[0114] Referring to Figure 24The combination air duct 810 includes an outer housing 825, a partition 830, a discharge outlet 835, a fan 838, and a seal 840. The outer housing 825 defines an internal passageway. The partition 830 extends through the internal passageway to divide the internal passageway into a first sub-passageway 845a and a second sub-passageway 845b. The first sub-passageway 845a has both a larger area and a larger volume than the second sub-passageway 845b. The discharge outlet 835 overlaps both the first sub-passageway 845a and the second sub-passageway 845b, such that the discharge outlet 835 provides an opening for both the first sub-passageway 845a and the second sub-passageway 845b. The fan 838 is positioned opposite the discharge outlet 835, which is in fluid communication with the first sub-passageway 845a. The seal 840 is disposed on the outer housing 825, around a periphery of the discharge outlet 835, and mates with the housing 820 of the portable power supply 805.

[0115] The seal 840 can be formed from any common sealant, such as, but not limited to, water-based latex sealants, acrylic sealants, and silicone sealants. The seal 840 can be flexible and compressible, such that the seal 840 can mate with irregularities in the housing 820. The seal 840 can reduce air flow leakage at the interface of the discharge outlet 835 of the combination air duct 810 and the housing 820. The seal 840 can also inhibit the leakage, recirculation, and accumulation of contaminants (such as dust, water, aerosols, and other particulates) within the overall system of the portable power supply 805. The seal 840 can also increase the required tolerance between the discharge outlet 835 of the combination air duct 810 and the housing 820, thereby improving the ease of manufacturing the combination air duct 810. In some embodiments, the seal 840 can be formed by a secondary injection of a thermoplastic elastomer. Thus, with further reference to Figure 25 The seal 840 can be intentionally formed to create an interference 848 of the edge of the discharge outlet 835 with the housing 820. The interference 848 between the edge of the discharge outlet 835 and the portable power supply 805 can further increase the strength of the seal 840, thereby enhancing the ingress protection of the portable power supply 805.

[0116] In some embodiments, with continued reference to Figure 25In further embodiments, as shown in FIG. 8, the combination air duct 810 can additionally include ingress drain holes 850 in fluid communication with ingress outlet holes 855 disposed in the housing 820 of the portable power supply 805. The ingress drain holes 850 and the ingress outlet holes 855 can effectively drain any ingress (e.g., water) into the combination air duct 810 from the combination air duct 810 and the portable power supply 805 during operation of the portable power supply 805. Thus, the ingress drain holes 850 can improve the ability of the portable power supply 805 to remove ingress from the housing 820 of the portable power supply 805.

[0117] In further embodiments, as shown in FIG. 8, the combination air duct 810 can additionally include ingress drain holes 850 in fluid communication with ingress outlet holes 855 disposed in the housing 820 of the portable power supply 805. The ingress drain holes 850 and the ingress outlet holes 855 can effectively drain any ingress (e.g., water) into the combination air duct 810 from the combination air duct 810 and the portable power supply 805 during operation of the portable power supply 805. Thus, the ingress drain holes 850 can improve the ability of the portable power supply 805 to remove ingress from the housing 820 of the portable power supply 805. Figure 23 and Figure 26 In further embodiments, as shown in FIG. 8, the combination air duct 810 can additionally include a thermistor 860 disposed proximate the fan 838. In particular, the thermistor 860 is disposed at a downstream location of the fan 838. The thermistor 860 enables a user to monitor the system ambient temperature of the portable power supply 805. In particular, the thermistor 860 can determine the system ambient temperature at the downstream location of the fan 838 and provide or communicate a temperature signal to the control system 822. In the illustrated embodiment, the system ambient temperature is the temperature of the ambient air within the housing of the portable power supply 805. In other embodiments, the system ambient temperature can be the temperature of the ambient air surrounding the housing 820 of the portable power supply 805. As such, the portable power supply 805 includes an operating temperature range. If the system ambient temperature exceeds the operating temperature range, the performance of the portable power supply 805 can decrease.

[0118] When the control system 822 receives a temperature signal from the thermistor 860 indicating that the ambient system temperature is outside of the operating temperature range of the portable power supply 805, the control system 822 prevents operation of the portable power supply 805. Additionally, the fan 838 includes an operating temperature range. When the control system 822 receives a temperature signal from the thermistor 860 indicating that the ambient system temperature is outside of the operating temperature range of the fan 838, the control system 822 prevents operation of the fan 838. The operating temperature range of the portable power supply 805 and the operating temperature range of the fan 838 can be different, such that the thermistor 860 provides a temperature signal to the control system 822 to prevent operation of one or both of the portable power supply 850 and the fan 838. As described above, the portable power supply 805 includes two combined air ducts 810. Each duct 810 includes a fan 838 and a thermistor 860. Thus, when the control system 822 receives a temperature signal from the thermistor 860 of at least one of the combined air ducts 810 indicating that the ambient system temperature is outside of the operating temperature range of the portable power supply 805, the control system 822 prevents operation of the portable power supply 805.

[0119] As shown in FIG. 8, the portable power supply 805 includes a mounting port 865 for the charger subsystem 815, the mounting port 865 having mounting features, such as fastener receiving holes. The combined air duct 810 can be mounted in the same mounting port 865 as the charger subsystem 815. By using the same mounting port 865 as the charger subsystem 815, system integration and overall size of the portable power supply 805 is not substantially affected by the introduction of the combined air duct 810 into the portable power supply 805. Thus, various components of the portable power supply 805 can be easily interchanged without changing the overall size of the portable power supply 805. Figure 27 Figure 28 As shown in FIG. 8, the portable power supply 805 includes a mounting port 865 for the charger subsystem 815, the mounting port 865 having mounting features, such as fastener receiving holes. The combined air duct 810 can be mounted in the same mounting port 865 as the charger subsystem 815. By using the same mounting port 865 as the charger subsystem 815, system integration and overall size of the portable power supply 805 is not substantially affected by the introduction of the combined air duct 810 into the portable power supply 805. Thus, various components of the portable power supply 805 can be easily interchanged without changing the overall size of the portable power supply 805.

[0120] Returning to FIG. 8, the portable power supply 805 includes a mounting port 865 for the charger subsystem 815, the mounting port 865 having mounting features, such as fastener receiving holes. The combined air duct 810 can be mounted in the same mounting port 865 as the charger subsystem 815. By using the same mounting port 865 as the charger subsystem 815, system integration and overall size of the portable power supply 805 is not substantially affected by the introduction of the combined air duct 810 into the portable power supply 805. Thus, various components of the portable power supply 805 can be easily interchanged without changing the overall size of the portable power supply 805. Figure 23 ​During operation of the portable power supply 805, each of the battery subsystem 812 and the charger subsystem 815 dissipate heat. The battery subsystem 812 dissipates heat on an end face 870 of the battery subsystem 812. The fan 838 can then induce a first exhaust air flow 875 in a first direction A3 that in turn transfers heat away from the battery subsystem 812. More specifically, the fan 838 can induce the first exhaust air flow 875 along a conduit 880 that extends along the right and left sides of the portable power supply 805, respectively. The first exhaust air flow 875 flows along the conduit 880 in the first direction A3 and reaches the combined air duct 810. In the illustrated implementation, the portable power supply 805 includes at least two combined air ducts 810 so that one combined air duct 810 is positioned on the right side and the other combined air duct 810 is positioned on the left side of the portable power supply 805. In this manner, the combined air duct 810 on the right side receives a portion of the first exhaust air flow 875 and the combined air duct 810 on the left side receives another portion of the first exhaust air flow 875.

[0121] Subsequently, the fan 838 of each combined air duct 810 directs the first exhaust air flow 875 to a first sub-passage 845a so that the first exhaust air flow 875 can exit the portable power supply 805 via a vent 885 in the housing 820 of the portable power supply 805, as shown. Referring to Figure 29 Figure 23 and Figure 29 , the vent 885 is disposed at the intersection of the left and front sides of the portable power supply 805 and the intersection of the right and front sides of the portable power supply 805. In this manner, the first sub-passage 845a in the left combined air duct 810 directs the first exhaust air flow 875 out of the housing 820 in a third direction A5 and the first sub-passage 845a in the right combined air duct 810 directs the first exhaust air flow 875 out of the housing 820 in a fourth direction A6. Each of the third and fourth directions A5, A6 extend diagonally or transversely to the first and second directions A3, A4, as will be described in detail below.

[0122] In the illustrated implementation, the charger subsystem 815 includes a charger fan 890. The charger fan 890 can induce a second exhaust air flow 895 in a second direction A4 that is toward the right or left side of the portable power supply 805. In the illustrated implementation, the first and second directions A3, A4 are orthogonal. In some implementations, as shown, the charger subsystem 815 can be provided with a cover 897. The cover 897 can be positioned over the fins of the housing 820 to facilitate the flow of the second exhaust air flow 895 away from the charger subsystem 815. Figure 30 ​​

[0123] Returning to Figure 23 As the second exhaust air stream 895 exits the charger subsystem 815, the second exhaust air stream 895 is directed into one of the right and left combination air ducts 810. As such, the right combination air duct 810 receives a portion of the second exhaust air stream 895 while the left combination air duct 810 receives another portion of the second exhaust air stream 895. The second exhaust air stream 895 is directed into the second sub-passage 845b of each combination air duct 810. The second sub-passage 845b in the left combination air duct 810 directs the second exhaust air stream 895 out of the housing 820 in a third direction A5 while the second sub-passage 845b in the right combination air duct 810 directs the second exhaust air stream 895 out of the housing 820 in a fourth direction A6. As such, by redirecting the first exhaust air stream 875 and the second exhaust air stream 895, the combination air duct 810 advantageously allows the first exhaust air stream 875 and the second exhaust air stream 895 to exit the portable power supply 805 in the same direction, thereby reducing heat exhaust inefficiencies and allowing heat to quickly exit the portable power supply 805, preventing the portable power supply 805 from overheating.

[0124] Figure 31 Performance differences of the portable power supply 805 are demonstrated. Specifically, Figure 31 Mass flow rate charts are provided in accordance with various embodiments of the portable power supply. Under normal exhaust conditions, as indicated by bar 899a, the portable power supply 805 can exchange air at a mass flow rate of less than 20 grams / second. More specifically, the portable power supply 805 can exchange air at a mass flow rate of approximately 19 grams / second. Under conditions where the charger fan 890 is provided, as indicated by bar 899b, the portable power supply 805 can exchange air at a mass flow rate of 20 to 25 grams / second. More specifically, the portable power supply 805 can exchange air at a mass flow rate of approximately 23 grams / second. Under conditions where the charger subsystem 815 is provided with the charger fan 890 and the cover 897, as indicated by bar 899c, the portable power supply 805 can exchange air at a mass flow rate of 25 to 30 grams / second. More specifically, the portable power supply 805 can exchange air at a mass flow rate of approximately 27.5 grams / second.

[0125] Returning to Figure 21 and Figure 22In another embodiment of the portable power supply 5, 205, 405, each subsystem of the portable power supply 5, 205, 405 can be designed to a lower than required level of Ingress Protection Code or Underwriters Laboratory rating. For example, each subsystem can be designed and manufactured to a solid IP Code of 3 and a liquid IP Code of 5. At a solid IP Code of 3, each subsystem can be protected from intrusion of solid objects greater than 2.5mm, such as a screwdriver. At a liquid IP Code of 5, each subsystem can be protected from harmful effects of water spray in each direction. Once each subsystem of the subsystems 615, 620 are integrated into the housing 25 and chassis 65 of the portable power supply 5, 205, 405, each subsystem of the subsystems 615, 620 and the overall system of the portable power supply 5, 205, 405 can achieve the required fully rated IP Code or UL rating. By partially rating each subsystem 615, 620 to allow the portable power supply 5, 205, 405 to achieve the required fully rated IP Code or UL rating upon full assembly, the portable power supply 5, 205, 405 can advantageously improve system thermal management and performance. Partially rating each subsystem 615, 620 can also reduce manufacturing costs and improve manufacturing simplicity.

[0126] As described above, in particular embodiments within the scope of the present disclosure, some or all of the illustrated features can be omitted, and some illustrated features can not be required for implementation of all embodiments. The order in which the above-described features are presented is not necessarily the order in which they are implemented, and the above-described features can be implemented in another order or in combinations. While each of the embodiments and / or configurations has been described, variations and changes therein can be made by those of ordinary skill in the art. The various features of the disclosure described herein can be included in portable power supplies independent of other features, and no particular element, practice, or combination is required for the full utilization of the disclosure. The disclosure is not limited to specific embodiments and / or configurations described herein, but extends to equivalents of what is claimed and / or made available under the doctrine of equivalents, whether or not they are presently claimed.

[0127] While the application has been described with reference to certain embodiments and / or configurations thereof, variations and changes therein can be made by those of ordinary skill in the art. The various features of the disclosure described herein can be included in portable power supplies independent of other features, and no particular element, practice, or combination is required for the full utilization of the disclosure. The disclosure is not limited to specific embodiments and / or configurations described herein, but extends to equivalents of what is claimed and / or made available under the doctrine of equivalents, whether or not they are presently claimed.

Claims

1. A portable power supply, characterized by comprise: a housing defining a cavity, the housing comprising an upper portion, a lower portion, a plurality of air inlets defined in the lower portion, the plurality of air inlets in fluid communication with the cavity, and a plurality of air outlets defined in the upper portion, the plurality of air outlets in fluid communication with the cavity; at least one battery cell disposed in the cavity; a charger electrically coupled with the battery cell; and an accessory coupled to the upper portion, the accessory configured to at least partially cover each of the air outlets such that airflow exiting the air outlets passes through a circuitous path. At least one of the plurality of air inlets is additionally configured as a liquid drain.

2. The portable power supply of claim 1, wherein, The accessory comprises at least one coupling interface disposed on a surface of the accessory opposite the upper portion.

3. The portable power supply of claim 1, wherein, The air outlets are upwardly facing.

4. The portable power supply of claim 1, wherein, The accessory comprises a wall portion angled with respect to an axis defined by and extending through the air outlets such that the wall portion redirects airflow.

5. The portable power supply of claim 1, wherein, The accessory comprises a downwardly drooping sidewall defining a plurality of accessory exit apertures such that airflow redirected by the wall portion is configured to exit through the accessory exit apertures.

6. The portable power supply of claim 5, wherein, The upper portion comprises an upwardly extending ridge portion disposed proximate the air outlets.

7. The portable power supply of claim 6, wherein, The upper portion further comprises a drain channel, the ridge portion disposed between the drain channel and the air outlets.

8. The portable power supply of claim 7, wherein, The accessory comprises a gap between the downwardly drooping sidewall and the wall portion, the gap in fluid communication with the drain channel.

9. The portable power supply of claim 8, wherein, The drain channel extends along at least a portion of an outer edge of the upper portion.

10. The portable power supply of claim 9, wherein, The upper portion further comprises a plurality of drain ports, the drain channel in fluid communication with the drain ports.

11. The portable power supply of claim 10, wherein, The charger is disposed in the cavity.

12. The portable power supply of claim 1, wherein, comprise:

13. A portable power supply, characterized by a housing comprising an outer wall, an inner wall defining a cavity in the housing, and an airflow channel disposed between the outer wall and the inner wall; a fan coupled to the housing, the fan configured to force airflow through the airflow channel; at least one battery cell disposed in the cavity; and a charger electrically coupled with the battery cell. The outer wall is coupled to the inner wall by a plurality of fasteners.

14. The portable power supply of claim 13, wherein, The fan is disposed between the inner wall and the outer wall.

15. The portable power supply of claim 13, wherein, An inlet of the airflow channel is formed in the portable power supply at a location opposite an outlet of the airflow channel so that airflow entering the inlet travels in a direction parallel to a direction in which airflow exits the outlet.

16. The portable power supply of claim 13, wherein, The airflow channel is disposed in a majority of an outer edge of a cross-section of the portable power supply.

17. The portable power supply of claim 13, wherein, The charger is disposed within the cavity.

18. The portable power supply of claim 13, wherein, comprise:

19. A portable power supply, characterized by a housing defining a cavity, the housing comprising an upper portion, a lower portion, ​ a plurality of air inlets defined in the lower portion, the plurality of air inlets in fluid communication with the cavity, and a plurality of air outlets defined in the upper portion, the plurality of air outlets in fluid communication with the cavity, the plurality of air outlets opening laterally; at least one battery cell disposed in the cavity; and a charger electrically coupled with the battery cell.

20. The portable power supply of claim 19, wherein, a deflector disposed in the cavity, the deflector and the upper portion cooperating to define a duct, the duct including a downwardly opening portion, at least one of the plurality of air inlets vertically aligned with the downwardly opening portion.

21. The portable power supply of claim 19, wherein, the upper portion includes an interface configured to receive a lower portion of a stacking interface.

22. The portable power supply of claim 19, wherein, the upper portion includes one or more raised upper surfaces, the plurality of air outlets opening laterally between a top surface of the upper portion and the one or more raised upper surfaces.

23. The portable power supply of claim 19, wherein, the cavity is one of a plurality of cavities.

24. The portable power supply of claim 19, wherein, further comprising an accessory coupled to the upper portion, the accessory configured to at least partially cover each of the air outlets such that airflow exiting the air outlets passes through a circuitous path.

25. A portable power supply, characterized by comprising: a housing defining a cavity, the housing including an upper portion, a lower portion, and a plurality of vent holes defined in the housing, the plurality of vent holes configured to release hot air from within the cavity; at least one battery cell disposed in the cavity; a charger electrically coupled with the battery cell; and a framework extending around the housing, portions of the framework at least partially covering the plurality of vent holes.

26. The portable power supply of claim 25, wherein, the framework positioned at a distance from the plurality of vent holes.

27. The portable power supply of claim 25, wherein, the housing comprises a polymer, the housing including one or more weld lines, at least one of the weld lines extending along a direction transverse to at least one of the plurality of vent holes.

28. The portable power supply of claim 27, wherein, the housing further includes a plurality of louvers defining the plurality of vent holes, at least one louver intersecting a respective weld line.

29. A portable power supply, characterized by comprising: a housing defining a cavity therein; a first subsystem disposed within the cavity, the first subsystem emitting heat; a first fan configured to induce a first exhaust airflow in a first direction, thereby transferring heat from the first subsystem in the first direction; a second subsystem disposed within the cavity, the second subsystem emitting heat; a second fan configured to induce a second exhaust airflow in a second direction, thereby transferring heat from the second subsystem in the second direction; and an airflow duct receiving the first and second exhaust airflows, the airflow duct redirecting the first and second exhaust airflows out of the housing. ​ 30. The portable power supply of claim 29, wherein, The airflow duct includes a partition that defines a first sub-passage and a second sub-passage within the airflow duct, wherein the first sub-passage receives the first exhaust airflow, and wherein the second sub-passage receives the second exhaust airflow.

31. The portable power supply of claim 29, wherein, One of the first fan and the second fan is integrally formed with the airflow duct.

32. The portable power supply of claim 29, wherein, The airflow duct is a first airflow duct, the portable power supply further comprising a second airflow duct.

33. The portable power supply of claim 32, wherein, The first airflow duct receives a portion of the first exhaust airflow and a portion of the second exhaust airflow, wherein the second airflow duct receives another portion of the first exhaust airflow and another portion of the second exhaust airflow.

34. The portable power supply of claim 29, wherein, The airflow duct includes a plurality of exhaust apertures for directing an ambient intrusion flow out of the housing.

35. The portable power supply of claim 29, wherein, The first subsystem is a battery subsystem, and wherein the second subsystem is a charger subsystem.

36. The portable power supply of claim 35, wherein, The housing includes a mounting port for coupling the second subsystem to the housing, and wherein the airflow duct is couplable to the same mounting port as the second subsystem.

37. The portable power supply of claim 29, wherein, The second subsystem includes a cover positioned on a heat sink in the housing to facilitate flow of the second exhaust airflow into the airflow duct.

38. The portable power supply of claim 29, wherein, The airflow duct redirects the first exhaust airflow out of the housing along a third direction, wherein the airflow duct redirects the second exhaust airflow out of the housing along the third direction, and wherein the third direction extends transverse to the first direction and the second direction.

39. The portable power supply of claim 29, wherein, The first direction is orthogonal to the second direction.

40. A portable power supply, characterized by Comprising: a housing defining a cavity therein; a first subsystem arranged within the cavity, the first subsystem emitting heat; a second subsystem arranged within the cavity, the second subsystem emitting heat; and an airflow duct comprising a passage defined therein, and a partition extending through the passage such that the passage is divided into a first sub-passage receiving a first exhaust airflow conveying the heat of the first subsystem and a second sub-passage receiving a second exhaust airflow conveying the heat of the second subsystem.

41. The portable power supply of claim 40, wherein, further comprising a fan in fluid communication with the first sub-passage.

42. The portable power supply of claim 40, wherein, The first sub-passage is larger than the second sub-passage.

43. The portable power supply of claim 40, wherein, The airflow duct further comprises a seal disposed on an edge of the airflow duct at an exhaust outlet of the passage, and wherein the seal is formed of a thermoplastic elastomer overmolded, which creates an interference between a housing of the portable power supply and an outer housing of the airflow duct.

44. A portable power supply, characterized by Comprising: a housing defining a cavity therein; a control system arranged in the cavity and configured to control operation of the portable power supply; a subsystem sealed within the cavity, the subsystem emitting heat; and an airflow duct comprising a fan for directing the heat out of the housing, and a thermistor for monitoring temperature within the cavity and the airflow duct, the thermistor configured to deliver a temperature signal to the control system.

45. The portable power supply of claim 44, wherein, the thermistor is positioned downstream of the fan.

46. The portable power supply of claim 44, wherein, the control system prevents operation of the portable power supply when the control system receives a temperature signal from the thermistor indicating that the ambient system temperature is outside an operating temperature range of the portable power supply.

47. The portable power supply of claim 44, wherein, the control system prevents operation of the fan when the control system receives a temperature signal from the thermistor indicating that the ambient system temperature is outside an operating temperature range of the fan.

48. The portable power supply of claim 44, wherein, the airflow duct is a first airflow duct comprising a first fan and a first thermistor, the portable power supply further comprising a second airflow duct comprising a second fan and a second thermistor, and wherein the control system prevents operation of the portable power supply when the control system receives a temperature signal from at least one of the first thermistor and the second thermistor indicating that the ambient system temperature is outside an operating temperature range of the portable power supply.

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