Patent Publication Number: US-2020276947-A1

Title: Power distribution module for use in a vehicle

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of pending U.S. patent application Ser. No. 16/105,517 filed Aug. 20, 2018, which is also a continuation of U.S. patent application Ser. No. 15/434,997 filed Feb. 16, 2017 (now U.S. Pat. No. 10,071,698), the content of which is incorporated in its entirety herein. 
    
    
     TECHNICAL FIELD 
     The disclosure relates generally to a power distribution system for use in a vehicle and more particularly to a power distribution module or board having multiple power inputs for use in a coach or bus. 
     BACKGROUND 
     Power distribution systems are commonly used in vehicles such as coaches or buses to route and control the power throughout the vehicle. These systems include multiple fuses and connectors for distributing power to and protecting various components of the vehicle. Multiple distribution circuits may be used to accommodate the vehicle&#39;s power demands. Consequently, there may exist a need for a system or circuit configured to fit in a limited physical space and capable of receiving multiple input voltages, handling multiple current levels at different voltage levels. 
     BRIEF SUMMARY 
     The present disclosure is directed to a vehicle power distribution module or circuit board, for use in a vehicle such as a coach or bus. The panel or board may be used to distribute and protect all main power on a coach or bus. 
     In one example, the disclosure provides a power distribution module for a vehicle. The power distribution module includes a panel having a top side and a bottom side and having a perimeter, the perimeter of the panel comprising a top edge, a bottom edge, a first edge and a second edge, wherein the top edge is positioned opposite of the bottom edge and the first edge is positioned opposite of the second edge; a plurality of input terminals positioned on the panel proximate to the top edge, the plurality of input terminals comprising: a first input terminal adapted for connection to a first power supply, and a second input terminal adapted for connection to a second power supply; a first plurality of output terminals positioned on the panel proximate to the bottom edge, wherein the first plurality of output terminals is connected to the first input terminal; a first plurality of fuses connected between the first input terminal and the first plurality of output terminals, the first plurality of fuses positioned on the panel proximate to the first plurality of output terminals such that the first plurality of output terminals is positioned between the first plurality of fuses and the bottom edge; a second plurality of output terminals positioned on the panel proximate to the bottom, wherein the second plurality of output terminals is connected to the second input terminal; a second plurality of fuses connected between the second input terminal and the second plurality of output terminals, the second plurality of fuses positioned on the panel proximate to the second plurality of output terminals such that the second plurality of output terminals is positioned between the second plurality of fuses and the bottom edge. The voltage of the first power supply may be different than the voltage of the second power supply. 
     In some examples the voltage of the first power supply may be 24 volts and the voltage of the second power supply may be 12 volts. 
     In some examples a diameter of the first input terminal may be smaller than a diameter of the second input terminal. 
     The power distribution module may also include a first equalizer output terminal connected to the first input terminal and a second equalizer output terminal connected to the second input terminal, the first equalizer output terminal and the second equalizer output terminal positioned on the panel proximate to the top edge. 
     The power distribution module may also include a third plurality of output terminals connected to the first input terminal, and a third plurality of fuses connected between the first input terminal and the third plurality of output terminals. The first plurality of fuses may use a first fuse type, the second plurality of fuses may use a second fuse type, and the third plurality of fuses may use a third fuse type; and the third fuse type is different than the first fuse type and the second fuse type. 
     The power distribution module may also include a third input terminal, the third input terminal adapted for connection to switched input from the first power supply; a third plurality of output terminals connected to the third input terminal; a third plurality of fuses connected between the third input terminal and the third plurality of output terminals; a fourth input terminal, the fourth input terminal adapted for connection to switched input from the second power supply; a fourth plurality of output terminals connected to the fourth input terminal; and a fourth plurality of fuses connected between the fourth input terminal and the fourth plurality of output terminals. The first input terminal may be adapted for connection to hot input from the first power supply and the second input terminal may be adapted for connection to hot input from the second power supply. 
     The power distribution module may have a length of the top edge and a length of the bottom edge that are each less than or equal to 11 inches, and a length of the first edge and a length of the second edge that are each less than or equal to 8.5 inches. In other examples, the power distribution module may have a length of the top edge and a length of the bottom edge that are each between 10 inches and 12 inches, and wherein a length of the first edge and a length of the second edge that are each between 7 inches and 9 inches. 
     The panel of the power distribution module may be comprised of multiple layers including a first layer containing all electrical connections between the first input terminal and the first plurality of output terminals; a second layer containing all electrical connections between the second input terminal and the second plurality of output terminals; and a third layer composed substantially of insulating material. The third layer may be positioned between the first layer and the second layer. The power distribution module may be constructed using press fit technology. 
     In another example, the disclosure provides a power distribution module for a vehicle. The power distribution module includes a plurality of input terminals comprising: a first input terminal adapted for connection to a hot input from a first power supply; a second input terminal adapted for connection to a switched input from the first power supply; a third input terminal adapted for connection to a hot input from a second power supply; and a fourth input terminal adapted for connection to a switched input from the second power supply; a first plurality of output terminals, wherein each output terminal of the first plurality of output terminals is connected to one of the first input terminal, the second input terminal, the third input terminal, or the fourth input terminal; and a first plurality of fuses, wherein a single fuse of the first plurality of fuses is connectable between each output terminal of the first plurality of output terminals and the respective input terminal. The voltage of the first power supply may be different than the voltage of the second power supply. 
     The power distribution module may also include a second plurality of output terminals, wherein each output terminal of the second plurality of output terminals is connected to one of the first input terminal, the second input terminal, the third input terminal, or the fourth input terminal; and a second plurality of fuses, wherein a single fuse of the second plurality of fuses is connectable between each output terminal of the second plurality of output terminals and the respective input terminal. Each output terminal of the first plurality of output terminals may be a stud; and each output terminal of the second plurality of output terminals may use a connection type other than a stud. 
     The power distribution module may also include a panel having a top side and a bottom side and having a perimeter, the perimeter of the panel comprising a top edge, a bottom edge, a first edge and a second edge wherein the top edge is positioned opposite of the bottom edge and the first edge is positioned opposite of the second edge. The plurality of input terminals may be positioned on the panel and proximate to the top edge. The first plurality of output terminals may be positioned on the panel and proximate to the bottom edge. The second plurality of output terminals may be positioned on the panel below the plurality of input terminals and above the first plurality of output terminals. 
     The power distribution module may have a length of the top edge and a length of the bottom edge that are each less than or equal to 11 inches, and a length of the first edge and a length of the second edge that are each less than or equal to 8.5 inches. 
     The power distribution module may have a length of the top edge and a length of the bottom edge each of between 10 inches and 12 inches, and a length of the first edge and a length of the second edge that are each between 7 inches and 9 inches. 
     The power distribution module may also include a first equalizer output terminal connected to the first input terminal and a second equalizer output terminal connected to the second input terminal and positioned on the panel and proximate to the top edge. 
     In another example, the disclosure provides a power distribution system for a vehicle. The power distribution system may include a first power supply; a second power supply; a multi-layer panel having a top side and a bottom side and having a perimeter, the perimeter of the panel comprising a top edge, a bottom edge, a first edge and a second edge wherein the top edge is positioned opposite of the bottom edge and the first edge is positioned opposite of the second edge; a plurality of input terminals positioned on the panel and proximate to the top edge, the plurality of input terminals comprising: a first input terminal connected to a hot input from the first power supply; a second input terminal connected to a switched input from the first power supply; a third input terminal connected to a hot input from the second power supply; and a fourth input terminal adapted for connection to a switched input from the second power supply; a first plurality of output terminals positioned on the panel proximate to the bottom edge of the panel, each of the first plurality of output terminals comprising a stud, and each of the first plurality of output terminals connected to one of the first input terminal, the second input terminal, the third input terminal, or the fourth input terminal; a first plurality of fuses wherein a single fuse of the first plurality of fuses is connectable between each output terminal of the first plurality of output terminals and the respective input terminal, and wherein the first plurality of fuses is comprised of individual fuses rated for currents of 50 amps to 80 amps; a second plurality of output terminals positioned on the panel proximate to the first edge of the panel, each of the second plurality of output terminals comprising a stud, and each of the second plurality of output terminals connected to one of the first input terminal, the second input terminal, the third input terminal, or the fourth input terminal; a second plurality of fuses wherein a single fuse of the second plurality of fuses is connectable between each output terminal of the second plurality of output terminals and the respective input terminal, and wherein the second plurality of fuses is comprised of individual fuses rated for currents of 40 amps or less; a third plurality of output terminals positioned on the panel proximate to the first edge of the panel, each of the third plurality of output terminals comprising a stud, and each of the third plurality of output terminals connected to one of the first input terminal, the second input terminal, the third input terminal, or the fourth input terminal; and a third plurality of fuses wherein a single fuse of the third plurality of fuses is connectable between each output terminal of the third plurality of output terminals and the respective input terminal, and wherein the third plurality of fuses is comprised of individual fuses rated for currents of 70 amps or less; a fourth plurality of output terminals positioned on the panel, each of the fourth plurality of output terminals comprising a connection type other than a stud, and each of the fourth plurality of output terminals connected to one of the first input terminal, the second input terminal, the third input terminal, or the fourth input terminal; a fourth plurality of fuses wherein a single fuse of the fourth plurality of fuses is connectable between each output terminal of the fourth plurality of output terminals and the respective input terminal, and wherein the fourth plurality of fuses is comprised of individual fuses rated for currents of 25 amps or less. In various embodiments, the distance between the top edge and the bottom edge may not exceed 8.5 inches and the distance between the first edge and the second edge may not exceed 11 inches. The voltage supplied by the first power supply may be different than the voltage supplied by the second power supply. 
     The power distribution module may also include a communication module positioned on the multi-layer panel and configured to alert a user if at least one predetermined fuse of one of the first plurality of fuses, the second plurality of fuses, the third plurality of fuses, and the fourth plurality of fuses is blown. 
     The power distribution system may also include first equalizer output terminal connected to the first input terminal and positioned on the panel and proximate to the top edge; and a second equalizer output terminal connected to the second input terminal and positioned on the panel and proximate to the top edge. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the claims, are incorporated in, and constitute a part of this specification. The detailed description and illustrated embodiments described serve to explain the principles defined by the claims. 
         FIG. 1A  illustrates a top view of an exemplary power distribution module or panel according to aspects of this disclosure. 
         FIG. 1B  illustrates a perspective view of an exemplary power distribution module or panel according to aspects of this disclosure. 
         FIG. 1C  illustrates a top view of the panel of  FIG. 1B . 
         FIG. 1D  illustrates a back view of the panel of  FIG. 1B . 
         FIG. 1E  illustrates a top side view of the panel of  FIG. 1B . 
         FIG. 1F  illustrates a bottom side view of the panel of  FIG. 1B . 
         FIG. 1G  illustrates a left side view of the panel of  FIG. 1B . 
         FIG. 1H  illustrates a right side view of the panel of  FIG. 1B . 
         FIG. 2  illustrates a block circuit diagram showing a portion of an exemplary panel as according to aspects of this disclosure. 
         FIG. 3  illustrates a block circuit diagram showing a portion of an exemplary panel as according to aspects of this disclosure. 
         FIG. 4  illustrates a top view of an exemplary panel may be installed in a coach or bus according to aspects of this disclosure. 
         FIG. 5A  illustrates a perspective view of an exemplary base portion of a cover according to aspects of this disclosure. 
         FIG. 5B  illustrates a perspective view of an exemplary base portion of a cover according to aspects of this disclosure. 
         FIG. 5C  illustrates a perspective view of an exemplary base portion of a cover according to aspects of this disclosure. 
         FIG. 5D  illustrates a perspective view of an exemplary base portion of a cover according to aspects of this disclosure. 
         FIG. 5E  illustrates a face plate of a cover according to aspects of this disclosure. 
         FIG. 5F  illustrates a grommet according to aspects of this disclosure. 
         FIG. 5G  illustrates a grommet according to aspects of this disclosure. 
         FIG. 5H  illustrates a grommet frame according to aspects of this disclosure. 
         FIG. 5I  illustrates a grommet frame according to aspects of this disclosure. 
         FIG. 6 . illustrates a top view of an exemplary panel installed in a coach or bus according to aspects of this disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In the following description of the various embodiments, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration various embodiments in which aspects described herein may be practiced. It is to be understood that other embodiments may be utilized and structural and functional modifications may be made without departing from the scope of the described aspects and embodiments. Aspects described herein are capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. Rather, the phrases and terms used herein are to be given their broadest interpretation and meaning. The use of “including” and “comprising” and variations thereof is meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof. The use of the terms “mounted,” “connected,” “coupled,” “positioned,” “engaged” and similar terms, is meant to include both direct and indirect mounting, connecting, coupling, positioning and engaging. 
     Also, while the terms “top,” “bottom,” “front,” “back,” “side,” “rear,” and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein as a matter of convenience, e.g., based on the example orientations shown in the figures or the orientation during typical use. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure. The reader is advised that the attached drawings are not necessarily drawn to scale. 
     “Plurality,” as used herein, indicates any number greater than one, either disjunctively or conjunctively, as necessary, up to an infinite number. 
     The present disclosure is directed to a power distribution module panel or circuit board for use in a vehicle such as a coach or bus. As will be discussed in greater detail below, in some embodiments, the distribution module may be used to distribute and protect all the main power on a coach or bus. The power distribution module may include multiple power inputs and power outputs. The board includes multiple different locations to engage different types/models of fuses. These fuse locations are connected through the board between the inputs and respective outlets. The power distribution module may include inputs for power at multiple different voltages (for example, 12V and 24V power inputs). The power distribution module may include inputs for switched power, which includes a disconnect between the power source and the board, and hot power, which does not include a disconnect between the power source and the board. In some embodiments, the power distribution module may also include a control module and/or a communications module and may provide the ability to monitor key fuses to provide warning to the driver based on J1939 communication protocol. The control module may monitor the status of a number of fuses on the board and may communicate the status of those fuses to the vehicle driver. In general the power distribution module is much more compact than other known power distribution systems for vehicles such as coaches or buses. In some embodiments, the power distribution module may allow a user to combine all fuse modules for a coach or bus into one component and allow for additional room for expansion if necessary. Although the power distribution module may be made using any known method, in some embodiments, the distribution module may be constructed using press-fit technology (with no soldering). 
     Turning now to  FIGS. 1A-1F , an exemplary power distribution module or panel  50  is shown. The panel has a top side  52  and a bottom side  54 , and an outer perimeter having a top edge  56 , a bottom edge  58 , a first edge  60  and a second edge  62 . As shown in  FIG. 1A , the top edge  56  is positioned opposite of the bottom edge  58  and the first edge  60  is positioned opposite of the second edge  62 . Although the panel  50  as shown in  FIG. 1A  has a generally rectangular shape, the panel may have other shapes including for example, triangular, octagonal, hexagonal, and circular. 
     The panel  50  may include a plurality of input terminals positioned on the panel proximate to the top edge  56 . In the embodiment shown in  FIG. 1A , input terminals  101 ,  102 ,  103 , and  104  are positioned proximate to the top edge  56  of the panel  50  closer to the first edge  60  than the second edge  62 . Although four input terminals  101 ,  102 ,  103 , and  104  are displayed in  FIG. 1A , any number of input terminals may be used. 
     As shown in  FIG. 1A-1F  input terminals  101 ,  102 ,  103 , and  104  may comprise a stud or other connection mechanism. The input terminals may be configured to be connected to a number of different power sources. For example, and as will be discussed in more detail below, input terminals  101  and  102  may be connected to a first power supply and input terminals  103  and  104  may be connected to a second power supply. In some embodiments one of the first power supply and the second power supply may have a higher voltage than the other of the first power supply and the second power supply. In one embodiment, for example, at least one of the input terminals is configured to be connected to a 12-volt power source and at least one of the input terminals is configured to be connected to a 24-volt power source. Additionally, the input terminals may be configured to connect to a switched power supply, which includes a disconnect between the power source and the board, and/or a hot power, which does not include a disconnect between the power source and the panel  50 . In one example, input terminal  101  may be connected to a 24-volt switched power supply, input terminal  102  may be connected to a 24-volt hot power supply, input terminal  103  may be connected to a 12-volt switched power supply, and input terminal  104  may be connected to a 12-volt hot power supply. 
     Advantageously, in various embodiments, the input terminals  101 ,  102 ,  103 ,  104  may be different sizes including having different diameters. This may help avoid confusion for a technician responsible for connecting the correct power source to the correct input terminal  101 ,  102 ,  103 ,  104 . For example, in some embodiments, the input terminals connected to the higher voltage power supply (e.g., 24-volt power) may be smaller than the input terminals corresponding to the lower voltage power supply (e.g., 12-volt power) and/or the input terminals connected to the hot power may be smaller than the input terminals corresponding to the switched power supply. Advantageously this may ensure that the higher voltage power supply (e.g., 24-volt power) cannot be attached to the input terminals configured for attachment to the lower voltage power supply (e.g., 12-volt power). Advantageously this may ensure that the hot power cannot be attached to the input terminals configured for attachment to the switched power. For example, in one embodiment, the input terminal connected to the hot lower voltage power supply (e.g., 12-volt power) may be smaller than the input terminal connected to the switched lower voltage power supply (e.g., 12-volt power), and the input terminal connected to the hot higher voltage power supply (e.g., 24-volt power) may be smaller than the input terminal corresponding to the switched higher voltage power supply (e.g., 24-volt power). 
     In addition to the input terminals described above, the panel  50  includes a plurality of output terminals which may be located primarily along an edge and/or edges  56 ,  58 ,  60 ,  62  of the panel  50 . Each output terminal may be connected to one of the input terminals  101 ,  102 ,  103 , and  104 , and may include one or more fuses or other devices connected in between the input terminal and respective output terminal. The output terminals may be generally similar in construction to the input terminals. In various embodiments, the output terminals positioned proximate to the bottom edge  58  may include output terminals connected to each of the four input terminals  101 ,  102 ,  103 , and  104 . Additionally or alternatively, the output terminals positioned proximate to the side edge  62  may include output terminals connected to each of the four input terminals  101 ,  102 ,  103 , and  104 . Consequently, a 24-volt switched power output, a 24-volt hot power output, a 12-volt switched power output, and a 12-volt hot power output may all be located along a single edge. 
     Referring now more specifically to  FIGS. 1A-1F , the panel  50  may include a plurality of output terminals  111 ,  112 , and  113 . The output terminals  111 ,  112 , and  113  may be generally similar in construction to the input terminals. As seen in  FIG. 1A . In some embodiments, the panel may include output terminals  111 ,  112 , and  113  configured to connect to an equalizer and/or inverter. 
     The equalizer output terminals  111  and  113  may be used when the panel or board is connected to a bus with multiple power sources. For example, a coach or bus may provide power from two sources, the engine when it is running and one or more batteries. In some situations, and as can be seen in the circuit drawing in  FIG. 2 , a coach or bus may use two 12-volt batteries  201  and  202  in series. A coach or bus may further have an alternator that uses 24-volts. In these situations, an equalizer  203  may be necessary to ensure both batteries are charged equally. 
     In one embodiment, as shown in  FIG. 1A , the panel  50  may include a 12-volt equalizer output terminal  113 , a 24-volt equalizer output terminal  111 , and an inverter output terminal  112 . The output terminals  111 ,  112 , and  113  may be positioned on the same edge  56  as the input terminals  101 ,  102 ,  103 , and  104  or otherwise near the input terminals  101 ,  102 ,  103 , and  104 . As shown in  FIG. 1A , these output terminals  111 ,  112 , and  113  may be positioned proximate to the top edge  56  and closer to the second edge  62  than the first edge  60 . Advantageously, positioning the input terminals  101 ,  102 ,  103 , and  104 , equalizer output terminals  111 ,  113 , and inverter output terminal  112  along the same edge as each other may allow for shorter cables if the power source is very close to the equalizer. 
     As shown in  FIGS. 1A-1F  and  FIG. 2 , the 12-volt equalizer output terminal  113  may be connected to the 12-volt switched power input  103  with a fuse  123  connected in between. Likewise, the 24-volt equalizer output terminal  111  may be connected to the 24-volt switched power input  101  with a fuse  121  connected in between. The inverter output terminal  112  may be connected to the 24-volt hot power input  102  with a fuse  122  in between. In various embodiments, fuses  121 - 123  may be rated for 125 amps or 150 amps, as can be seen in the example schematic shown in  FIG. 2 . 
     In addition to the outputs described above, the panel  50  may include a number of additional outputs. In an example layout, the high current or major outputs may be positioned along a single edge of the panel  50 . In one example, the power distribution module  50  may include a first plurality of output terminals  171 ,  172 ,  173 , and  174  positioned on the panel  50  proximate the bottom edge  58  of the panel. Each terminal  171 ,  172 ,  173 , and  174  of the first plurality of output terminals may comprise a stud or other connection mechanism. Each individual terminal of the first plurality of output terminals  171 ,  172 ,  173 , and  174  may be connected to one of the input terminals  101 ,  102 ,  103 , or  104 . The power distribution module  50  may also include a first plurality of fuses  161 ,  162 ,  163 , and  164 . Each individual fuse of the first plurality of fuses  161 ,  162 ,  163 , and  164  is connectable between each individual output terminal of the first plurality of output terminals  171 ,  172 ,  173 , and  174  and the respective input terminal  101 ,  102 ,  103 , or  104  that it is connected to. In some embodiments the first plurality of fuses  161 ,  162 ,  163 , and  164  may be comprised of individual fuses rated for currents of 50 amps to 80 amps. 
     In this example, output terminals  171  are connected to the 12-volt switched power input terminal  101  through fuses  161 . Output terminals  172  are connected to the 12-volt hot power input terminal  102  through fuses  162 . Output terminals  173  are connected to the 24-volt hot power input terminal through fuses  163 . And output terminals  174  are connected to the 24-volt switched power input terminals  104  through fuses  164 . In various embodiments, to support the higher current output terminals, MIDI fuses may be used for the fuses at  161 - 164 . In various embodiments, fuses  161 - 164  may be rated for 50 amps or higher. In various embodiments, fuses  161  may be rated for 80 Amps or higher, and fuses  162 - 164  may be rated for 50 Amps. 
     Additional output terminals may be located along a second edge. The power distribution module  50  may include a second plurality of output terminals  151 ,  152 ,  153 , and  154  positioned on the panel proximate the first edge of the panel  62  as shown in  FIGS. 1A-1F  and  FIG. 3 . Each of the second plurality of output terminals  151 ,  152 ,  153 , and  154  may comprise a stud or other connection device. Each individual terminal of the second plurality of output terminals  151 ,  152 ,  153 , and  154  may be connected to one of one of the input terminals  101 ,  102 ,  103 , or  104 . The power distribution module  50  may also include a second plurality of fuses  141 ,  142 ,  143 ,  144 . And each individual fuse of the second plurality of fuses  141 ,  142 ,  143 ,  144  is connectable between each output terminal of the second plurality of output terminals  151 ,  152 ,  153 , and  154  and the respective input terminal  101 ,  102 ,  103 , or  104 . In some embodiments, the second plurality of fuses may be comprised of individual fuses rated for currents of 40 amps or less. 
     The power distribution module  50  may include a third plurality of output terminals  191 ,  192 ,  193 , and  194  positioned on the panel  50  proximate the first edge of the panel  62  as shown in  FIGS. 1A-1F  and  FIG. 2 . Each of the third plurality of output terminals  191 ,  192 ,  193 , and  194  may comprise a stud or other connection device. Each individual terminal of the third plurality of output terminals  191 ,  192 ,  193 , and  194  may be connected to one of the input terminals  101 ,  102 ,  103 , or  104 . The power distribution module  50  may also include a third plurality of fuses  181 ,  182 ,  183 ,  184 . Each individual fuse of the third plurality of fuses  181 ,  182 ,  183 ,  184  may be connectable between each output terminal of the third plurality of output terminals  191 ,  192 ,  193 , and  194  and the respective input terminal  101 ,  102 ,  103 , or  104 . In some embodiments, the third plurality of fuses  181 ,  182 ,  183 ,  184  is comprised of individual fuses may be rated for currents of 70 amps or less. 
     Additional, lower current output terminals, supporting lower current than output terminals along the edges may be positioned away from the edges, towards the center of the panel  50 . The lower current output terminals may use connector output terminals, as opposed to stud output terminals as shown with regard to output terminals  111 - 113 ,  151 - 154 ,  171 - 174 , and  191 - 194 . 
     The power distribution module  50  may include a fourth plurality of output terminals  135  and  136  positioned on the panel. Each of the fourth plurality of output terminals  135  and  136  may comprise a connection type other than a stud. Each of the fourth plurality of output terminals may be connected to one of one of the input terminals  101 ,  102 ,  103 , or  104 . The power distribution module  50  may include a fourth plurality of fuses  131 ,  132 ,  133 ,  134 . Each fuse of the fourth plurality of fuses  131 ,  132 ,  133 ,  134  may be connectable between each output terminal of the fourth plurality of output terminals  135 ,  136  and the respective input terminal  101 ,  102 ,  103 , or  104 . In some embodiments, the fourth plurality of fuses  131 ,  132 ,  133 ,  134  may be comprised of individual fuses rated for currents of 25 amps or less or of 20 amps or less. In the example shown in  FIGS. 1A-1F and 3 , output terminals  135  are connected to the 24-volt inputs  101  and  102  through fuses  131  and  132 , whereas output terminals  136  are connected to the 12-volt inputs  103  and  104  through fuses  133  and  134 . In various embodiments fuses  131 - 134  may be rated for below 25 amps, or below 20 amps. 
     As one skilled in the art will appreciate, the positioning of the inputs, outputs, and fuses described above are merely exemplary and may be changed as necessary. Further, the precise number of fuses and outputs shown in  FIGS. 1-4  is also exemplary. For example, as shown in  FIGS. 1A-1F , the first edge  60  does not include any output terminal studs. This design is compatible with coaches or busses or other vehicles that do not provide access to one side of the panel or board. One skilled in the art will appreciate that in some embodiments a different edge may not include any output terminals. 
     Advantageously the power distribution module  50  may support multiple current levels and multiple fuse types. Example fuse types that may be used include but are not limited to MIDI fuses, MAXI fuses, ATC fuses, and AMI fuses. In various embodiments, and as described above, the fuses and outputs may be grouped based on amp rating. For example, as seen in  FIG. 1A , the equalizer output terminals  111  and  113 , inverter output terminal  112 , and the output terminals  171 - 174  are all connected to the input terminals via fuses with higher current ratings, with current ratings up to 200 Amps, such as the MIDI fuses. Additionally or alternatively, output terminals  191 - 194  are connected to the input terminals via fuses  181 - 184  with a medium current ratings, with Amp ratings up to 70 amps, such as the MAXI fuses. Output terminal studs  151 - 154  may be connected to the input terminals through fuses  141 - 144  supporting a lower current such as ATC or MINI fuses. Finally, in various embodiments including connector output terminals  135  and  136 , low current fuses  131 - 134  such as ATC or MINI fuses may be used. 
     Another feature of various embodiments of the present power distribution module  50  is that the panel or board is capable of supporting multiple connection interfaces. Output terminals may be studs or plug-in type connectors, or other known types of output terminals. A connector output terminal may require a lower current level, such as below 25 amps or below 20 amps. A stud output terminal can be configured to support a higher current than a connector output terminal. As an example, fuses connected to a stud output terminal may have an amp rating as high as 50 amps, 80 amps, or 200 amps. Stud output terminals corresponding to higher current levels may use larger studs than output terminals corresponding to lower current levels. 
     In various embodiments the power distribution module  50  may include a port for a communication module  105 . The communication module (not shown) may be used to monitor certain preselected fuses. The communication module may send a signal, using for example J1939 communication protocol, that may alert a user, such as a driver or mechanic, the status of the certain preselected fuses. In some embodiments, the communication module may be capable of monitoring up to five fuses, and in other embodiments the communication module may be capable of monitoring each fuse on the power distribution module  50 . In some embodiments, the communication module may be a CAN bus. In some embodiments the power distribution module  50  may not include the communication module  105 . In various embodiments, the power distribution module  50  may also include a port  106  for a control module (not shown). The control module may control one or more aspects of the panel  50 . 
     An advantage of the example layout depicted in  FIGS. 1A-1F  is that it may provide easier access to the input and output terminals configured for higher current by placing these proximate to the edges of the panel or board. As cables capable of carrying high current loads are generally bigger and more difficult to route, it may be advantageous to locate the high current input and output terminals along the edge. Since cables configured to carry a lower current and/or cables carrying signals from the control and communication terminal are generally smaller and easier to maneuver, low current outputs, communication outputs, and the control box are positioned on the interior of the panel or board surface.  FIG. 4  shows an example of how a panel  50  may be connected to a coach or bus, including the relative size of exemplary cables. As can be appreciated, cables of sizes other than those shown in  FIG. 4  may also be used. 
     Additionally, it may be advantageous to locate certain inputs and output terminals along the edge closest to the device to which the input and output terminals will connect to. For example, as shown in  FIG. 4 , on some coaches, the cable  205  from the input terminals  101 - 104  to disconnect  204  may be short, such as less than a foot in length. Additionally, the equalizer (now shown) may be located nearby. Thus, as shown in  FIG. 4 , it may be advantageous for the input terminals  101 - 104  and equalizer output terminals  111 - 113  along the same edge  56  to minimize cable length. 
     Additionally, advantageously, and as described above, the panel  50  may include a combination of the previously described features and also fit in a constrained or limited space. In various embodiments, a panel  50  may be limited to 8.5 inches by 11 inches, or may even be limited to 7.5 inches by 10.5 inches. For example, the power distribution module may have a length of the top edge  56  and a length of the bottom edge  58  that are each less than or equal to 11 inches, and a length of the first edge  60  and a length of the second edge  62  that are each less than or equal to 8.5 inches. In another example, the power distribution module  50  may have a length of the top edge  56  and a length of the bottom edge  58  each of between 10 inches and 12 inches, and a length of the first edge  60  and a length of the second edge  62  that are each between 7 inches and 9 inches. An efficient layout as described throughout the specification may make it possible for the panel or board to receive multiple inputs of different power levels and/or different power types and also provide numerous outputs at one or more power levels and/or of one or more power types and/or at one or more different current levels. 
     Further, advantageously, panels  50  described herein include the ability for a single panel  50  to handle multiple power inputs, as well as high currents. This may include inputs at different voltage levels, such as at 12-volts and 24-volts. This may additionally or alternatively include both a switched power input and a hot power input. Panels  50  described herein may be capable of handling currents up to 1000 Amps. 
     The power distribution module  50  may be formed by any known method. In some embodiments, the power distribution module  50  may be formed of separate layers such that connections between each input  101 ,  102 ,  103 , and  104  and their associated outputs are each on separate layers. Theses layers, which have electrical connections, may be separated by layers which have insulating material such as ceramic. Therefore, with regard to the example shown in  FIGS. 1A-1F , each of the four inputs  101 ,  102 ,  103 , and  104  may have its own layer including all connections between the input and the associated outputs. Between these layers having electrical connections may be layers of insulation. In various embodiments, the panel or board may be constructed using press fit technology. Press-fit technology may allow the panel or board to be constructed with no soldering. 
     In various embodiments, the power distribution module  50  may include a cover  250  to enclose or partially enclose the power distribution module  50 . In some embodiments, the cover  250  may include a base portion  252  and a cover plate  254 . Exemplary base portions  252  are shown in  FIGS. 5A-5D  and an exemplary cover plate  254  is shown in  FIG. 5E . The base portion  252  may include four side walls  256 ,  258 ,  260 , and  262  and each of the side walls may include apertures  264 . As shown in  FIGS. 5A-5D , the apertures may be any suitable shape including for example rectangular and circular, as shown, but may be any other shape including triangular or oval. As will be discussed in greater detail below, cables connected to other portions of the coach may pass through the apertures  264  to connect other portions of the coach to the power distribution module  50 . The base portion  252  may also include one or more fastening tabs  266  which may be used to fasten the cover  250  to a portion of the coach or bus such that the cover encloses the power distribution module  50 . As shown in  FIGS. 5A-5D , the fastening tabs  266  may be located at any suitable location on the base portion  252 . The base portion  252  may also include one or more fastening tabs  268  which may be used to removably engage the cover plate  254  with the base portion  252 . 
     An exemplary cover plate  254  is shown in  FIG. 5E . The cover plate  254  may also include one or more apertures  270 . The apertures  270  may be any suitable shape including for example rectangular, circular, triangular, or oval. As will be discussed in greater detail below, cables connected to other portions of the coach may pass through the apertures  270  to connect other portions of the coach to the power distribution module  50 . 
     Advantageously the cover plate  254  is removably engaged with the base portion  252  such that a user can easily remove the cover plate  254  to service the power control module  50 . This allows easy access to the power distribution module  50  to replace any fuses and or adjust the connections of any cables connecting to the power distribution module  50 . 
     An exemplary cover  250  installed in a coach is shown in  FIG. 6 . As shown in  FIG. 6 , cables may pass through apertures  264  and  270 . In some embodiments, the cover may include one or more grommets to seal the apertures. Exemplary grommets  280  are shown in  FIGS. 5F and 5G . As shown in  FIGS. 5F and 5G , the grommets  280  may include a passageway  282  through which a cable may travel and an insertion portion  284 . The insertion portion  284  may be flexible to allow for insertion of a cable through the grommet  280 . As shown in  FIGS. 5F and 5G , each grommet  280  may include one or more passageways  282 . Additionally, each passageway  282  may be any appropriate size to accommodate the cable passing through the passageway  282 . 
     The grommets  280  may be engaged directly into the apertures  264 ,  270  or in some embodiments the grommets may be engaged with a frame  290  and the frame  290  may be engaged with the aperture  264 ,  270 . Exemplary frames  290  are shown in  FIGS. 5H and 5I . The frames  290  may be any shape including rectangular and circular as shown and may include one or more apertures  292  to engage the grommets  280 . 
     Although one method of removably connecting the cover  250  to the coach is shown in  FIGS. 5 and 6 , many other removable connections may be used. In some examples, the cover  250 , or portions of the cover such as the cover plate  250 , may include one or more magnets to hold the cover to the coach. In another example, the cover  250  may include a hook and loop fastening system. In still other examples the cover  250  may include press-fit connecting mechanisms. 
     In some embodiments the cover  250  may protect the power distribution module  50  from the outside elements. The cover  250  may protect the panel  50  from dust. For example in some embodiments the cover may stop all ingress of dust and/or may be dust tight. The cover  250  may protect the panel  50  against water such that it is waterproof when tested for 30 minutes under 1 meter of water. In some embodiments, the housing  102  may be capable of achieving an IP67 rating which specifies that ingress of water in harmful quantities is not possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion). The IP67 test is 30 minutes long and the enclosure is tested with the lowest point of the enclosure 1000 mm below the surface of the water, or the highest point 150 mm below the surface whichever is deeper. 
     While various embodiments have been described, it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible that are within the scope of the claims. The various dimensions described above are merely exemplary and may be changed as necessary. Accordingly, it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible that are within the scope of the claims. Therefore, the embodiments described are only provided to aid in understanding the claims and do not limit the scope of the claims.