Patent Publication Number: US-2022227244-A1

Title: Charging device

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present application is a continuation application of International Patent Application No. PCT/JP2020/036368 filed on Sep. 25, 2020, which designated the U.S. and claims the benefit of priority from Japanese Patent Application No. 2019-189699 filed on Oct. 16, 2019. The entire disclosures of all of the above applications are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a charging device for a vehicle. 
     BACKGROUND 
     In an electric vehicle or hybrid vehicle, a charging connector is connected to a power supply cable outside the vehicle, such that an in-vehicle battery can be charged by supplying DC power from outside of the vehicle. 
     SUMMARY 
     According to a first aspect of the present disclosure for achieving the object, a charging device for a vehicle includes: a charging connector connected to a power supply cable outside the vehicle; a relay cable arranged inside the vehicle, the relay cable having one end connected to the charging connector; a battery charged by a direct current supplied from the charging connector; a battery cable having one end connected to the battery; a charging connection portion connected to the other end of the relay cable; a battery connection portion connected to the other end of the battery cable; a relay that switches the direct current to be supplied or not relative to the battery; and a housing arranged between the battery and the charging connector so as to house the relay. The charging connection portion is arranged on the housing adjacent to the charging connector, and the battery connection portion is arranged on the housing adjacent to the battery. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram showing a power conversion device, a vehicle, and a charging device according to the present disclosure. 
         FIG. 2  is a diagram showing a configuration of the power conversion device according to the present disclosure. 
         FIG. 3  is a diagram showing a configuration of a charging device according to a first embodiment of the present disclosure. 
         FIG. 4  is a modification of the first embodiment of the present disclosure. 
         FIG. 5  is a modification of the first embodiment of the present disclosure. 
         FIG. 6  is a diagram showing a configuration of a charging device according to a second embodiment of the present disclosure. 
         FIG. 7  is a diagram showing a configuration of a charging device according to the second embodiment of the present disclosure. 
         FIG. 8  is a view seen in an arrow direction VIII in  FIG. 2 . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     To begin with, examples of relevant techniques will be described. 
     In an electric vehicle or hybrid vehicle, an in-vehicle battery can be charged by supplying DC power from outside of the vehicle. This type of vehicle includes a charging connector that is connected to a power supply cable outside the vehicle, and a charging device that switches the DC power to be supplied or not from the charging connector to the battery. 
     The charging device is mounted on the vehicle. The charging device has a housing, a charging connection portion connected for charging, and a battery connection portion connected to the battery via a battery cable. In the vehicle, the charging device may be arranged between the charging connector and the battery. In that case, in the charging device, if the charging connection portion and the battery connection portion are provided adjacent to the charging connector of the housing, the length of the battery cable along the charging device may become long. If the length of the battery cable is long, the influence of power loss may be large during quick charging when a large current needs to be passed. 
     The present disclosure provides a charging device capable of reducing the influence of power loss during the quick charging. 
     According to a first aspect of the present disclosure for achieving the object, a charging device for a vehicle includes: a charging connector connected to a power supply cable outside the vehicle; a relay cable arranged inside the vehicle, the relay cable having one end connected to the charging connector; a battery charged by a direct current supplied from the charging connector; a battery cable having one end connected to the battery; a charging connection portion connected to the other end of the relay cable; a battery connection portion connected to the other end of the battery cable; a relay that switches the direct current to be supplied or not relative to the battery; and a housing arranged between the battery and the charging connector so as to house the relay. The charging connection portion is arranged adjacent to the charging connector in the housing, and the battery connection portion is arranged adjacent to the battery in the housing. 
     In the configuration of the first aspect, the charging connection portion is arranged adjacent to the charging connector in the housing, and the battery connection portion is arranged adjacent to the battery in the housing. Therefore, it is possible to restrict the length of the relay cable and the battery cable from becoming longer as compared with a case where the charging connection portion and the battery connection portion are provided on the same surface of the housing. Therefore, in the configuration of the above aspect, the influence of power loss due to the cable can be reduced at the time of charging. 
     Hereinafter, multiple embodiments of the present disclosure will be described with reference to the drawings. In the following description, the same reference symbols are assigned to corresponding components in each embodiment in order to avoid repetitive descriptions. In each embodiment, when only a part of the configuration is described, the corresponding parts of the configuration described in other embodiments may be applied to the remaining part of the configuration. In addition to the combinations of configurations specifically shown in various embodiments, the configurations of various embodiments can be partly combined even if not explicitly suggested, unless such combinations are contradictory. It should be understood that the unexplained combinations of the structural components recited in the following embodiments and modifications thereof are assumed to be disclosed in this description by the following explanation. 
     First Embodiment 
       FIG. 1  is a diagram showing a configuration of a power conversion device  1  (PC) according to the present disclosure, a battery  50  arranged inside a vehicle, and a DC power supply device  30  (DC) outside the vehicle. The DC power supply device  30  is connected to a charging connector  40  (C) provided in the vehicle by a power supply cable  31 . The charging connector  40  is connected to the power conversion device  1  by a relay cable  41  distributed inside the vehicle. The power conversion device  1  is connected to the battery  50  by a battery cable  51 . With the above configuration, the DC power supply device  30  is connected to the battery  50  via the power conversion device  1 . 
       FIG. 2  shows an example of the power conversion device  1  including the charging device  20  of the present disclosure. The power conversion device  1  disclosed in  FIG. 2  includes a housing  70 , a relay  60 , a DCDC converter  21 , a charger  22 , and an ECU  23 . The power conversion device  1  is connected to the charging connector  40  via the relay cable  41 , and is connected to the battery  50  via the battery cable  51 . 
     More specifically, there is a relay cable  41  having one end connected to the charging connector  40 . The other end of the relay cable  41  is connected to an input conductive member  75  by a charging connection portion  42  (DC) of the housing  70  located adjacent to the charging connector  40 . The charging connection portion  42  may have a fixing part such as fastening, to connect the relay cable  41  and the input conductive member  75 , or the relay cable  41  and the input conductive member  75  may come into contact with each other by fitting the resin connectors to each other. With the above configuration, the power conversion device  1  and the charging connector  40  are connected. Further, the charging connection portion  42  is connected to the relay  60  housed in the housing  70  of the power conversion device  1  via the input conductive member  75 . 
     The battery cable  51  has one end connected to the battery  50  and the other end connected to an output conductive member  76  by a battery connection portion  52  (BC). The battery connection portion  52  is arranged on the housing  70  adjacent to the battery. The battery connection portion  52  may have a fixing part such as fastening, to connect the battery cable  51  and the output conductive member  76 , or the battery cable  51  and the output conductive member  76  may come into contact with each other by fitting the resin connectors to each other. The battery connection portion  52  is connected to the relay  60  housed in the housing  70  via the output conductive member  76 . With the above configuration, the power conversion device  1  and the battery  50  are connected. Further, according to the above configuration, the power conversion device  1 , the charging connector  40  and the battery  50  are connected via the relay cable  41 , the charging connection portion  42 , the input conductive member  75 , the relay  60 , the output conductive member  76 , the battery connection portion  52  and the battery cable  51 . 
     From the above configuration that the charging connector  40  is connected to the DC power supply device  30 , the electric power input from the DC power supply device  30  is supplied to the battery  50  via the power conversion device  1 . 
     In  FIG. 2 , the power conversion device  1  includes the DCDC converter  21  housed in the housing  70 . The DCDC converter  21  is connected to the output conductive member  76  via the DCDC conductive member  77 . With the above configuration, the DCDC converter  21  is connected to the battery  50 . Further, the DCDC converter  21  is connected to the auxiliary battery  82  (ABT) via the terminal  78  (T) and the auxiliary conductive member  79 . With the above configuration, the battery  50  is connected to the auxiliary battery  82  via the DCDC converter  21 . 
     In  FIG. 2 , the power conversion device  1  includes the charger  22  housed in the housing  70 . The charger  22  is connected to the battery  50  via the AC output connector  92  (Out) and the AC output conductive member  93 . Further, the charger  22  is connected to the AC power supply device  81  (AC) via the AC input connector  90  (In) and the AC input conductive member  91 . With the above configuration, the battery  50  is connected to the AC power supply device  81  via the charger  22 . 
     In  FIG. 2 , the power conversion device  1  includes the ECU  23  housed in the housing  70 . The ECU  23  is communicably connected to the relay  60 , the DCDC converter  21 , and the charger  22 . 
     In the power conversion device  1 , a portion related to charging the battery  50  from the DC power supply device  30  is referred to as a charging device  20 . 
       FIG. 3  is a diagram showing the configuration of the charging device  20  in the first embodiment of the present disclosure. The charging device  20  includes the housing  70 , the charging connection portion  42 , the battery connection portion  52 , and the relay  60 . In the above configuration, the housing  70  is arranged between the battery  50  and the charging connector  40 . The charging connection portion  42  is arranged on the housing  70  adjacent to the charging connector, and the battery connection portion  52  is arranged on the housing  70  adjacent to the battery. 
     In the present disclosure, the housing  70  is arranged between the battery  50  and the charging connector  40 . Specifically, at least a part of the housing  70  is located in a region where the battery  50  and the charging connector  40  are connected by a straight line. In  FIG. 3 , the housing  70  has an input surface  73  on which the charging connection portion  42  is arranged and an output surface  74  on which the battery connection portion  52  is arranged. The input surface  73  and the output surface  74  oppose each other through the housing  70 . 
     As shown in  FIG. 3 , the housing  70  has a rectangular surface  70   a  having a pair of long sides and a pair of short sides. The input surface  73  is connected to one of the pair of long sides of the rectangular surface  70   a , and the output surface  74  is connected to the other of the pair of long sides. 
       FIG. 4  is a modification of the first embodiment, in which the DCDC converter  21  and the charger  22  are housed in the housing  70  of the charging device  20 .  FIG. 4  is a view in which the charging connection portion  42  is viewed from the charging connector in one direction orthogonal to the input surface  73 . In the above configuration, at least a part of the charging connection portion  42  and the battery connection portion  52  overlap each other. In  FIG. 4 , since the charging connection portion  42  is arranged at a position completely overlapping the battery connection portion  52 , the battery connection portion  52  does not appear on the drawing. 
     When the charging connection portion  42  is viewed in the same manner as described above, the DCDC converter  21  is arranged so as not to overlap the charging connection portion  42 . Further, in case where the charger  22  is provided in the housing  70 , the charger  22  is arranged so as not to overlap when the charging connection portion  42  is viewed in the same manner as described above. 
       FIG. 5  is a diagram showing a modification of the first embodiment. When the housing  70  is viewed from the upper side, the charger  22  and the DCDC converter  21  are arranged at different positions from the charging connection portion  42  in a width direction perpendicular to the one direction and the up-down direction. Similarly, the charger  22  and the DCDC converter  21  are arranged at different positions from the battery connection portion  52  in the width direction. 
     More preferably, the charging connection portion  42  and the battery connection portion  52  are attached to the housing  70  in one side area in the width direction with respect to the center of the housing  70 . The DCDC converter  21  and the charger  22  are arranged in the other side area in the width direction with respect to the center of the housing  70 . 
     In the above configuration, it is desirable that the relay  60  overlaps at least a part of the range where the charging connection portion  42  and the battery connection portion  52  are located in the width direction. More preferably, it is desirable that the charging connection portion  42  and the battery connection portion  52  are arranged at positions to completely overlap each other in the width direction. Further, it is desirable that the input conductive member  75  and the output conductive member  76  are arranged so as to be aligned in a straight line. 
     It is desirable that at least a part of the charging connection portion  42  overlaps with the charging connector  40  in the width direction. It is desirable that at least a part of the battery connection portion  52  overlaps with the battery  50  in the width direction. 
     The input conductive member  75  and the output conductive member  76  are flexible conductive members such as harnesses or bus bars. 
     As shown in  FIG. 8 , it is preferable that the battery  50 , the battery connection portion  52 , the relay  60 , the charging connection portion  42 , and the charging connector  40  are arranged at a height at which at least a part thereof overlap with each other in the up-down direction. Further, it is desirable that the battery cable  51 , the output conductive member  76 , the input conductive member  75 , and the relay cable  41  are arranged in a straight line perpendicular to the up-down direction. 
     According to the present embodiment, the power conversion device  1  has the charger  22 . The charger  22  is supplied with AC power from an AC power supply device  81  that obtains power from a household power source or the like via an AC input conductive member  91  and an AC input connector  90 . The charger  22  converts the AC power supplied from the AC power supply device  81  into DC power. After converting to DC power, the charger  22  supplies DC power to the battery  50  via the AC output conductive member  93  and the AC output connector  92  to charge the battery  50 . In the present disclosure, the charging of the battery  50  performed by the AC power supply device is referred to as normal charging. 
     The power conversion device  1  has the DCDC converter  21 . Power is supplied to the DCDC converter  21  from the battery  50  via the battery cable  51 , the battery connection portion  52 , the output conductive member  76 , and the DCDC conductive member  77 . The DCDC converter  21  converts the electric power supplied from the battery  50 . After the conversion, the DCDC converter  21  supplies the converted electric power to the auxiliary battery  82  via the auxiliary conductive member  79  and the terminal  78  to charge the auxiliary battery. 
     The power conversion device  1  has the relay  60 . In the above configuration, when power is supplied to the battery  50  from the DC power supply device  30  installed in the charging station or the like, the DC power is supplied to the battery  50  via the relay  60 . In the present disclosure, the charging performed from the DC power supply device  30  to the battery  50  is referred to as quick charging. The relay  60  connects or disconnects a conductive member and a cable for connecting or disconnecting the DC power supply device  30  and the battery  50 . 
     In the above configuration, the power conversion device  1  has the ECU  23 . The ECU  23  is connected to communicate with the relay  60 , the DCDC converter  21 , and the charger  22 . In the above configuration, the ECU  23  controls the operation of the relay  60 , the DCDC converter  21 , and the charger  22 . 
     According to the present embodiment, as shown in  FIG. 3 , the charging connection portion  42  is attached to the housing  70  adjacent to the charging connector  40 . In the above configuration, the charging connector  40  and the charging connection portion  42  can be brought closer to each other as compared with a case where the charging connection portion  42  is arranged adjacent to the battery  50 . 
     In the above configuration, the battery connection portion  52  is arranged on the housing  70  adjacent to the battery  50 . In the above configuration, the battery  50  and the battery connection portion  52  can be brought closer to each other as compared with a case where the battery connection portion  52  is arranged adjacent to the charging connector  40 . 
     With the above configuration, it is possible to restrict the length of the relay cable  41  connecting the charging connector  40  and the charging connection portion  42  from becoming long. Similarly, it is possible to suppress an increase in the length of the battery cable  51  that connects the battery  50  and the battery connection portion  52 . 
     When the lengths of the relay cable  41  and the battery cable  51  are shortened, the resistance of the relay cable  41  and the battery cable  51  is reduced. When the resistance is reduced, the power loss due to the relay cable  41  and the battery cable  51  is reduced. 
     The magnitude of the direct current flowing during the quick charging is larger than the magnitude of the alternating current flowing through the conductive member during normal charging. When a large current flows through the conductive member, the influence of power loss due to heat or the like becomes large. Therefore, there is a possibility that the influence of power loss will be large, especially at the time of quick charging in which a direct current is passed. Therefore, a configuration that can reduce the influence of power loss by suppressing increase in the length of the conductive member as in the above configuration is particularly effective at the time of quick charging. Therefore, in the above configuration, the charging efficiency of the battery  50  can be improved at the time of quick charging. 
     In the above configuration, the housing  70  is arranged between the charging connector  40  and the battery  50 . Further, the charging connection portion  42  is arranged on the housing  70  adjacent to the charging connector, and the battery connection portion  52  is arranged on the housing  70  adjacent to the battery  50 . Therefore, in the above configuration, it is possible to restrict the battery  50  from being arranged between the charging connector  40  and the housing  70 . Contrary to the above configuration, in case where the battery  50  is arranged between the housing  70  and the charging connector  40 , the length of the relay cable  41  may be increased by the size of the battery  50 . According to the present embodiment, since the battery  50  can be suppressed from being arranged between the housing  70  and the charging connector  40 , it is possible to suppress the length of the relay cable  41  from becoming long. Therefore, in the above configuration, the influence of the power loss at the time of quick charging of the battery  50  can be reduced. 
     In  FIG. 3 , the charging connector  40  is located on the front side of the vehicle, and at least a part of the battery  50  is located on the rear side of the vehicle. In the above configuration, a direction in which the charging connector  40  and the charging device  20  face each other is the same as a direction in which the battery  50  and the charging device  20  face each other. In the charging device  20  of  FIG. 3 , the input surface  73  and the output surface  74  are surfaces of the housing  70  opposing each other. When the charging device having the above configuration is mounted on the vehicle, the input surface  73  can be arranged adjacent to the charging connector  40 . Similarly, in the above configuration, the output surface  74  can be arranged adjacent to the battery  50 . With the above configuration, the charging connection portion  42  can be arranged adjacent to the charging connector  40  and the battery connection portion  52  can be arranged adjacent to the battery  50 . Therefore, with the above configuration, it is possible to restrict the lengths of the relay cable  41  and the battery cable  51  from becoming long. Therefore, in the above configuration, the influence of the power loss at the time of quick charging of the battery  50  can be reduced. 
     In the above configuration, as shown in  FIG. 3 , the housing  70  includes the rectangular surface  70   a  having a pair of long sides and a pair of short sides. The input surface  73  is connected to one of the pair of long sides of the rectangular surface  70   a , and the output surface  74  is connected to the other of the pair of long sides. According to the above configuration, the charging connection portion  42  and the battery connection portion  52  are arranged in the same direction as the one direction. Therefore, in the above configuration, the distance between the charging connection portion  42  and the battery connection portion  52  is about the same as the length of the short side of the housing  70 . That is, the total length of the input conductive member  75  and the output conductive member  76 , which connects the charging connection portion  42  and the battery connection portion  52 , is about the same as the length of the short side of the housing  70 . 
     Contrary to the above configuration, in case where the input surface  73  and the output surface  74  are arranged on the short side of the housing  70 , the charging connection portion  42  and the battery connection portion  52  are arranged so as to be aligned in the same direction as the extending direction of the long side of the housing  70 . Therefore, the distance between the charging connection portion  42  and the battery connection portion  52  is about the same as the length of the long side of the housing  70 . That is, the total length of the input conductive member  75  and the output conductive member  76  is about the same as the length of the long side of the housing  70 . 
     Therefore, in the above configuration, it is possible to restrict the lengths of the input conductive member  75  and the output conductive member  76  from becoming longer, compared with a case where the input surface  73  and the output surface  74  are arranged on the long side of the housing. Therefore, in the above configuration, the influence of the power loss due to the conductive member at the time of quick charging of the battery  50  can be reduced. 
     In the above configuration, when the charging connection portion is viewed from the charging connector  40  in the one direction, at least a part of the charging connection portion  42  and the battery connection portion  52  overlap each other. Contrary to the above configuration, in a case where the charging connection portion  42  and the battery connection portion  52  do not overlap when the charging connection portion  42  is viewed in the same manner as described above, the distance between the charging connection portion  42  and the battery connection portion  52  becomes longer in the up-down direction and the width direction as compared with the above configuration. That is, there is a possibility that the lengths of the input conductive member  75  and the output conductive member  76  become long. 
     Therefore, in the above configuration, it is possible to restrict the lengths of the input conductive member  75  and the output conductive member  76  from becoming longer as compared with a case where the charging connection portion  42  and the battery connection portion  52  do not overlap. Therefore, in the above configuration, the influence of the power loss due to the conductive member at the time of quick charging of the battery  50  can be reduced. 
     In the above configuration, as shown in  FIG. 4 , when the charging connection portion  42  is viewed from the charging connector  40  in one direction, the DCDC converter  21  is located not overlap with the charging connection portion  42  and the battery connection portion  52 . With the above configuration, it is possible to restrict the DCDC converter  21  from being arranged between the charging connection portion  42  and the battery connection portion  52 . 
     Contrary to the above configuration, in a case where the DCDC converter  21  is arranged to overlap the charging connection portion  42  and the battery connection portion  52  when the charging connection portion  42  is viewed from the charging connector  40  in one direction, the DCDC converter  21  is arranged between the charging connection portion  42  and the battery connection portion  52 . When the DCDC converter  21  is arranged as described above, the input conductive member  75  and the output conductive member  76  may need to extend along the DCDC converter. When the input conductive member  75  or the output conductive member  76  extends along the DCDC converter  21 , the length increases by the amount of the extension. 
     Therefore, in the above configuration, it is possible to restrict the length of the conductive member from becoming longer as compared with a case where the DCDC converter is arranged at a position to overlap with the charging connection portion  42  and the battery connection portion  52 . Therefore, in the above configuration, the influence of the power loss due to the conductive member can be reduced at the time of quick charging of the battery  50 . 
     In the above configuration, as shown in  FIG. 5 , the DCDC converter  21  and the charger  22  are arranged at position not overlap with the charging connection portion  42  and the battery connection portion  52  in the width direction. With the above configuration, the relay  60 , the input conductive member  75 , and the output conductive member  76  arranged between the charging connection portion  42  and the battery connection portion  52  are suppressed from overlapping with the DCDC converter  21  and the charger  22  in the width direction. Therefore, in the above configuration, it is possible to restrict the relay  60 , the input conductive member  75  and the output conductive member  76  from interfering with the DCDC converter  21  and the charger  22 , so that the space of the housing  70  can be effectively utilized. 
     In the above configuration, it is desirable that the charging connection portion  42  and the battery connection portion  52  completely overlap each other when the charging connection portion  42  is viewed from the charging connector  40  in the one direction. According to the above configuration, the distance between the charging connection portion  42  and the battery connection portion  52  is shorter than that in a case where the charging connection portion  42  and the battery connection portion  52  partially overlap with each other. Therefore, in the above configuration, it is possible to more effectively suppress the increase in the distance between the input conductive member  75  and the output conductive member  76 . Therefore, in the above configuration, the influence of power loss at the time of quick charging of the battery  50  can be reduced. 
     Second Embodiment 
     In the present embodiment, a direction orthogonal to the input surface  73  is defined as the first direction, and a direction orthogonal to the output surface  74  is defined as the second direction. A direction orthogonal to the first direction and the second direction is defined as the third direction. As shown in  FIG. 6 , the input surface  73  and the output surface  74  are orthogonal to each other. The “orthogonal” indicates a range of 80 degrees to 100 degrees, and does not mean only 90 degrees. More preferably, the angle between the input surface  73  and the output surface  74  is in the range of 85 degrees to 95 degrees. 
     In the present embodiment, the charging connection portion  42  and the battery connection portion  52  are arranged at positions where at least a part of the charging connection portion  42  and the battery connection portion  52  overlap each other on an axis of the third direction. 
     As shown in  FIG. 7 , when the charging connection portion  42  is viewed from the charging connector  40  in the first direction, the DCDC converter  21  is arranged at a position not overlap with the charging connection portion  42 . 
     In  FIG. 7 , when the charging connection portion  42  is viewed from the charging connector  40  in the first direction, the charger  22  is arranged at a position to overlap with the charging connection portion  42 , but may be arranged at a position not to overlap with the charging connection portion  42 . 
     In  FIG. 7 , the charging connection portion  42  is arranged between the output surface  74  and the center of the housing  70  in the second direction. The battery connection portion  52  is arranged between the input surface  73  and the center of the housing  70  in the first direction. When the battery connection portion  52  is viewed from the battery  50  in the second direction, the charger  22  is arranged at a position not overlap with the battery connection portion  52 . 
     In  FIG. 7 , when the battery connection portion  52  is viewed from the battery  50  in the second direction, the DCDC converter  21  is arranged at a position to overlap with the battery connection portion  52 , but may be arranged at a position not overlap with the battery connection portion  52 . 
     In  FIG. 6 , the charging connector  40  is provided on the fender side, that is, the lateral side of the vehicle. At least a part of the battery  50  is located on the rear side of the vehicle. Further, in the above configuration, a direction in which the charging connector  40  and the charging device  20  face each other and a direction in which the battery  50  and the charging device  20  face each other are orthogonal to each other. In the charging device  20  shown in  FIG. 6 , the input surface  73  and the output surface  74  of the housing  70  are orthogonal to each other. In the charging device  20  having the above configuration, the charging connection portion  42  can be arranged adjacent to the charging connector  40  with respect to the vehicle. Similarly, in the above configuration, the battery connection portion  52  can be arranged adjacent to the battery  50 . Therefore, with the above configuration, it is possible to restrict the lengths of the relay cable  41  and the battery cable  51  from becoming long. Therefore, in the above configuration, the influence of the power loss due to the conductive member can be reduced at the time of quick charging of the battery  50 . 
     In the above configuration, the charge connection portion  42  and the battery connection portion  52  are arranged at positions where at least a part of the charge connection portion  42  and the battery connection portion  52  overlap each other on the axis of the third direction. Therefore, in the above configuration, it is possible to suppress the distance between the charge connection portion  42  and the battery connection portion  52  from increasing, compared with a case where the charging connection portion  42  and the battery connection portion  52  are arranged at positions not overlap each other on the axis of the third direction. Therefore, in the above configuration, it is possible to restrict the distance between the input conductive member  75  and the output conductive member  76  from becoming long. Therefore, in the above configuration, the influence of the power loss due to the conductive member can be reduced at the time of quick charging of the battery  50 . 
     As shown in  FIG. 7 , in the above configuration, the DCDC converter  21  is arranged at a position not overlap the charging connection portion  42  when the charging connection portion  42  is viewed from the charging connector  40  in the first direction. In the above configuration, it is possible to suppress the DCDC converter  21  from being arranged at the position where the input conductive member  75  and the output conductive member  76  are arranged. Therefore, in the above configuration, it is possible to restrict the distance between the input conductive member  75  and the output conductive member  76  from becoming long by bypassing the DCDC converter  21 . Therefore, in the above configuration, the influence of the power loss due to the conductive member can be reduced at the time of quick charging of the battery  50 . 
     As shown in  FIG. 7 , the charging connection portion  42  is located on the housing  70  between the output surface  74  and the center of the housing  70  in the second direction. The battery connection portion  52  is located between the input surface  73  and the center of the housing  70  in the first direction. With the above configuration, it is possible to restrict the conductive member and the relay  60  from being arranged within the range between the center of the housing  70  and an opposite surface opposite to the input surface  73  in the first direction and between the center of the housing  70  and an opposite surface opposite to the output surface  74  in the second direction, in the housing  70 . 
     The center in the above refers to a geometric center of gravity of the housing  70  when the housing  70  is viewed from the third direction. 
     In the above configuration, the DCDC converter  21  and the charger  22  can be arranged in the above range. Therefore, in the above configuration, the DCDC converter  21  and the charger  22  are arranged at positions not overlap with the input conductive member  75 , the output conductive member  76 , and the relay  60 . Therefore, the DCDC converter  21  and the charger  22  can be restricted from interfering with the input conductive member  75 , the output conductive member  76 , and the relay  60 . Therefore, with the above configuration, the space can be effectively used while the components arranged in the housing  70  are restricted from interfering with each other. 
     OTHER EMBODIMENTS 
     Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and the following modifications are also included in the technical scope of the present disclosure. Furthermore, various changes can be made within the range that does not deviate from the scope of the present disclosure. 
     For example, in  FIG. 3 , the housing  70  in formed in a rectangular shape having a long side and a short side, but may have another shape such as a square that does not have a long side and a short side. 
     In the first embodiment, the housing  70  is a rectangular parallelepiped, but the surface of the housing  70  may not be flat and may have a shape having irregularities. 
     The housing  70  in the present disclosure may be integrally molded or may be composed of a plurality of members such as a lid and a box. 
     In the first embodiment, the charging connection portion  42  is arranged at a position overlapping with the battery connection portion  52  when the charging connection portion  42  is viewed from the charging connector  40  in the one direction, but may be arranged not to overlap with the charging connection portion  42 . 
     In  FIG. 4 , when the charging connection portion  42  is viewed from the charging connector  40  in the one direction, the charging connection portion  42  is arranged at a position not overlap with the DCDC converter  21  and the charger  22  but may be arranged overlap with the DCDC converter  21  and the charger  22 . 
     In  FIG. 5 , in the width direction, the charging connection portion  42  and the battery connection portion  52  are arranged at positions not to overlap with the DCDC converter  21  and the charger  22 , but may be arranged overlap with the DCDC converter  21  and the charger  22 . 
     In  FIG. 7 , the charging connection portion  42  is located between the output surface  74  and the center of the housing  70  in the second direction, but may be located at the center or between the center and an opposite surface opposite to the output surface  74 . 
     In  FIG. 7 , the battery connection portion  52  is located between the input surface  73  and the center of the housing  70  in the first direction, but may be arranged at the center or between the center and an opposite surface opposite to the input surface  73 . 
     In the present disclosure, the DCDC converter  21 , the charger  22 , and the ECU  23  are housed in the housing  70  of the charging device  20 , but may be housed in a housing different from the housing  70 .