Building

Abstract

A building (1) according to the present invention is used by people. The building (1) comprises: a building body (2) that includes a plurality of dwellings (3); a parking lot (5) that includes a plurality of parking spaces (6); and charging points (8). A charging point (8) is provided for each of the plurality of parking spaces (6) or for a pre-set number of the plurality of parking spaces (6). Each charging point (8) is associated with one of the plurality of dwellings (3), and is connected to a distribution panel of the associated dwelling (3) via power wiring (20).

Description

Building

[0001] The present disclosure relates to a building having power wiring.

[0002] A charging system for charging an electric vehicle is known (for example, Patent Document 1). The charging system described in Patent Document 1 includes a charging stand. The charging stand is connected to a power converter. The power converter is placed at a location away from the charging stand (charging post in the same document). For example, the power converter is placed in a building.

[0003] Japanese Patent Application Laid-Open No. 2013-529052

[0004] By the way, when using a charging system installed in a parking lot in an apartment building, the user needs to conclude a usage contract with the operator who operates the charging system.

[0005] (1) The building that solves the above problems is a building used by people, and includes a building main body including a plurality of dwelling units, a parking lot including a plurality of parking sections, and a charging stand provided in each of the plurality of parking sections or in some of the plurality of preset parking sections. Each of the charging stands is associated with any one of the plurality of dwelling units and is connected to the distribution board of the associated dwelling unit via power wiring.

[0006] According to this configuration, power can be supplied to an electric vehicle connected from the distribution board of the dwelling unit to the charging stand. Therefore, the electric vehicle can be charged with the power supplied to the dwelling unit without contracting with the operator who operates the charging system.

[0007] (2) In the building described in (1) above, the cross-sectional area of ​​the power wiring is the size corresponding to the length of the power wiring from the dwelling unit to the charging station associated with the dwelling unit. In a building, the length of the power wiring connecting the dwelling unit and the charging station differs for each dwelling unit. For this reason, if the cross-sectional area of ​​the power wiring connecting the dwelling unit and the charging station is the same for each dwelling unit, there will be variations in power distribution losses when supplying power from the dwelling unit to the electric vehicle via the charging station. In this regard, the above configuration makes it possible to suppress variations in power distribution losses in each dwelling unit when supplying power from the dwelling unit to the electric vehicle via the charging station.

[0008] (3) In the building described in (1) above, the cross-sectional area of ​​the power wiring is set such that the voltage drop rate from the dwelling unit to the charging station associated with the dwelling unit is less than or equal to a first value.

[0009] In buildings, the length of the power wiring connecting each dwelling unit to the charging station varies from unit to unit. Therefore, if the cross-sectional area of ​​the power wiring connecting each dwelling unit to the charging station is the same, the longer the power wiring, the greater the power distribution loss and the lower the voltage at the charging station. In this respect, the above configuration ensures that the voltage drop rate is below the first value. This suppresses voltage drop at the charging station.

[0010] (4) In a building described in any one of (1) to (3) above, the building further comprises a relay section provided in the main body of the building, and the power wiring comprises a first power wiring extending from the dwelling unit to the relay section and a second power wiring extending from the relay section to the charging station, the second power wiring being connected to the first power wiring by the relay section.

[0011] With this configuration, the construction of the building can be carried out separately for the first power wiring connected to each dwelling unit and for the second power wiring connected to each charging station.

[0012] (5) In the building described in (4) above, a conduit for protecting the power wiring is provided, wherein the conduit comprises a first conduit for protecting the first power wiring and a second conduit for protecting the second power wiring, the second conduit is buried underground with the second power wiring inserted through it, the charging station comprises a charging outlet to which the second power wiring is connected and a case through which the second conduit can be inserted, and the end of the second conduit is housed in the case. With this configuration, the second power line can be properly protected at the point where it emerges from the ground to the surface.

[0013] (6) In the building described in any one of (5) above, the charging stand further comprises a base for supporting the case, the base being made of concrete and covering the lower part of the case of the charging stand and the portion of the second conduit that emerges from the case into the ground.

[0014] In this configuration, the lower part of the case and the portion of the second conduit that protrudes from the case are fixed with concrete. Therefore, if an electric vehicle collides with the charging station, the charging station is less likely to tip over.

[0015] (7) In the building described in (5) or (6) above, the case of the charging station comprises a first opening in which the charging outlet is provided, a second opening for connection work to connect the charging outlet and the second power wiring, and a third opening for drawing in the second power wiring. With this configuration, since the second opening for connection work is provided in the case, the work efficiency of the connection work can be improved.

[0016] (8) In a building described in any one of (5) to (7) above, the case of the charging station is connected to the ground by a first ground wire, and the charging outlet is connected to a relay section provided in the building body by a second ground wire. With this configuration, when a leakage current occurs, events caused by the leakage current can be suppressed.

[0017] According to the building described herein, it has multiple dwelling units, and electric vehicles can be charged using the electricity supplied to the dwelling units.

[0018] This is a schematic diagram of a building according to the embodiment. This is a schematic diagram showing the wiring system of one dwelling unit in a building according to the embodiment. This is a schematic diagram of a charging station. This is a schematic diagram showing another example of the wiring system of one dwelling unit. This is a schematic diagram showing another example of a charging station.

[0019] The building 1 of this embodiment will be described with reference to Figures 1 to 5. In this embodiment, the parking lot 5 is one element of the building 1. In this embodiment, the electric vehicle 18 is a vehicle that is powered by electricity stored in a battery through charging. Specifically, the electric vehicle 18 includes BEVs (Battery Electric Vehicles) and PHEVs (Plug-in Hybrid Electric Vehicles).

[0020] Building 1 is a building used by people. Building 1 comprises a building body 2, a parking lot 5, and a charging station 8. Building 1 further comprises a relay section 10 provided in the building body 2. Building 1 further comprises an electrical conduit 30.

[0021] [Building Body] As shown in Figure 1, in this embodiment, the building body 2 is a multi-unit residential building. The building body 2 includes a plurality of dwelling units 3. In this embodiment, one dwelling unit 3 is associated with one parking space 6 on a one-to-one basis. Also, one dwelling unit 3 is associated with one charging station 8 located in the parking space 6 on a one-to-one basis. Therefore, the resident of one dwelling unit 3 has exclusive use of the parking space 6 associated with that dwelling unit 3 and the charging station 8 associated with that dwelling unit 3.

[0022] The main building 2 draws power from the commercial power supply 13 via a distribution board 14. Multiple dwelling units 3 receive power from the distribution board 14. As shown in Figure 2, each dwelling unit 3 has a distribution board 15. Each dwelling unit 3's distribution board 15 is connected to the distribution board 14. The distribution board 15 distributes power to one or more electrical devices 16 in the dwelling unit 3. The electrical devices 16 in each room are connected to the distribution board 15 via outlets. The distribution board 15 also supplies power to charging stations 8 that are associated one-to-one with each dwelling unit 3. The charging stations 8 that are associated one-to-one with each dwelling unit 3 are connected to the distribution board 15 via power wiring 20.

[0023] A power meter 19 is connected to the distribution board 15 to measure power consumption. The power meter 19 measures the amount of power consumed downstream of the distribution board 15. Specifically, the power meter 19 measures the total amount of power used within the dwelling unit 3 and the amount of power supplied from the distribution board 15 to the charging station 8 for charging the electric vehicle 18. This allows the total amount of power used by the residents to be determined. Other power meters 19 may be connected to the power wiring 20 described later. This allows the amount of power used for charging the electric vehicle 18 to be determined.

[0024] [Parking Lot] Parking lot 5 is provided adjacent to the main building 2. In this embodiment, parking lot 5 is provided on the ground. Parking lot 5 may be a multi-story parking garage configured to accommodate multiple cars vertically.

[0025] Parking lot 5 includes multiple parking spaces 6. Each parking space 6 is partitioned so that one car can be parked in it. In this embodiment, the parking spaces 6 are partitioned by white lines placed on the paved ground.

[0026] In one example, the parking lot 5 is composed of multiple rows 5A. Each row 5A is composed of multiple parking spaces 6. The extension direction DX of row 5A is defined as the direction in which the multiple parking spaces 6 are lined up. The arrangement direction DY of the multiple rows 5A is defined as the direction in which the multiple rows 5A are lined up. The arrangement direction DY of the multiple rows 5A intersects with the extension direction DX of row 5A. This arrangement of multiple rows 5A reduces the variation in distance from each of the multiple parking spaces 6 to the building body 2 compared to the case where all of the parking spaces 6 are lined up in a single row.

[0027] [Power Wiring] Referring to Figures 1 and 2, the power wiring 20 connecting the dwelling unit 3 and the charging station 8 associated with the dwelling unit 3 will be described. The power wiring 20 comprises a first power wiring 21 and a second power wiring 22. The first power wiring 21 extends from the dwelling unit 3 to the relay unit 10. The second power wiring 22 extends from the relay unit 10 to the charging station 8. The second power wiring 22 is connected to the first power wiring 21 by the relay unit 10. The pair of the first power wiring 21 and the second power wiring 22 is fixed. That is, the first power wiring 21 is connected to the second power wiring 22, which is pre-configured to be connected to the first power wiring 21.

[0028] The relay unit 10 has a plurality of terminals 10A. The number of terminals 10A is equal to the number of power wirings 20. Each terminal 10A connects one first power wiring 21 to a second power wiring 22 that is paired with the first power wiring 21. The relay unit 10 has a metal housing that accommodates the plurality of terminals 10A.

[0029] [Structure of Power Wiring] In this embodiment, the distribution board 15 of the dwelling unit 3 supplies power to the electric vehicle 18 in the same way that it supplies power to the electrical equipment 16 in the dwelling unit 3. The distance from the distribution board 15 of the dwelling unit 3 to the charging station 8 is significantly larger than the distance from the distribution board 15 of the dwelling unit 3 to the electrical equipment 16 inside the dwelling unit 3. Because the distance from the distribution board 15 of the dwelling unit 3 to the charging station 8 is large, there is a large power distribution loss due to voltage drop in the power wiring 20. For this reason, the power wiring 20 connecting the distribution board 15 of the dwelling unit 3 and the charging station 8 has a different structure from the in-house power wiring 27 inside the dwelling unit 3. The electrical equipment 16 is connected to the in-house power wiring 27. The structure of the power wiring 20 connecting the distribution board 15 of the dwelling unit 3 and the charging station 8 will be described below.

[0030] As described above, there is a risk of significant power distribution loss due to the length of the power wiring 20 connecting the distribution board 15 of dwelling unit 3 and the charging station 8 (hereinafter also referred to as the power wiring length). For this reason, the cross-sectional area of ​​the power wiring 20 is larger than the cross-sectional area of ​​the in-dwelling power wiring 27 that is wired within dwelling unit 3. Preferably, the cross-sectional area of ​​the power wiring 20 is set such that the voltage drop rate from dwelling unit 3 to the charging station 8 associated with dwelling unit 3 is less than or equal to a first value. In one example, the first value is 2%.

[0031] The building structure 2 contains multiple dwelling units 3. In each of the multiple dwelling units 3, the distribution board 15 of the dwelling unit 3 is connected by power wiring 20 to a charging station 8 associated with the dwelling unit 3. Therefore, the building 1 is equipped with multiple power wiring 20. The number of power wiring 20 is equal to the number of dwelling units 3 that are connected one-to-one with the charging station 8.

[0032] Furthermore, the lengths of each of the multiple power lines 20 (hereinafter referred to as power line lengths) are different. Specifically, for each of the multiple dwelling units 3, the distance between the dwelling unit 3 and the charging station 8 associated with it is different. Therefore, if all of the multiple power lines 20 were made of the same type of cable with the same diameter, the power distribution loss would differ in each dwelling unit 3. In order to suppress such variations in power distribution loss, the multiple power lines 20 have the following configuration.

[0033] The cross-sectional area of ​​the power wiring 20 is proportional to the length of the power wiring from the dwelling unit 3 to the charging station 8 associated with the dwelling unit 3. Therefore, the longer the power wiring length, the larger the cross-sectional area of ​​the power wiring 20.

[0034] Let's describe a specific power wiring 20. In a power wiring 20, the cross-sectional area of ​​the first power wiring 21 that constitutes the power wiring 20 is sized according to the length of the power wiring 20. Similarly, the cross-sectional area of ​​the second power wiring 22 that constitutes the power wiring 20 is sized according to the length of the power wiring 20. The first power wiring 21 and the second power wiring 22 that constitute the power wiring 20 are configured such that their respective cross-sectional areas are equal.

[0035] As described above, each of the multiple power lines 20 is configured such that the voltage drop rate from the dwelling unit 3 to the charging station 8 associated with the dwelling unit 3 is less than or equal to a first value. In one example, the first value is 2%.

[0036] [Conduit] The conduit 30 protects the power wiring 20. The conduit 30 is configured so that the power wiring 20 passes through it.

[0037] As shown in Figure 2, the conduit 30 comprises a first conduit 31 protecting the first power wiring 21 and a second conduit 32 protecting the second power wiring 22. The first conduit 31 is placed inside the building 1 with the first power wiring 21 inserted through it. Preferably, in addition to the first power wiring 21, a third ground wire 25 is inserted through the first conduit 31. The third ground wire 25 connects the ground terminal provided on the distribution board 15 to the relay unit 10. The second conduit 32 is buried underground with the second power wiring 22 inserted through it. Preferably, in addition to the second power wiring 22, a second ground wire 24 is inserted through the second conduit 32. The second ground wire 24 connects the ground terminal provided on the charging outlet 41 of the charging station 8 to the relay unit 10.

[0038] [Charging Station] The charging station 8 is a facility for charging the electric vehicle 18. The charging station 8 has a charging outlet 41. The charging outlet 41 is configured to accept a charging cable 43.

[0039] Each charging stand 8 is associated with any one of a plurality of dwelling units 3. Further, each charging stand 8 is connected to the distribution board 15 of the associated dwelling unit 3 via a power wiring 20.

[0040] In the present embodiment, the charging stand 8 is provided in each of a plurality of parking sections 6. The charging stand 8 has one power outlet 41. One power wiring 20 is connected to the charging stand 8.

[0041] As shown in FIG. 3, the charging stand 8 includes a power outlet 41 to which a second power wiring 22 is connected, and a case 44 through which the second power wiring 22 and the second electric conduit 32 can be inserted. The charging stand 8 further includes a base 45 that supports the case 44.

[0042] The base 45 is made of concrete. The base 45 covers the lower part of the case 44 of the charging stand 8 and the part of the second electric conduit 32 that exits from the case 44 into the ground. Crushed stone 45A is laid under the base 45.

[0043] The case 44 includes a first opening 47 where the power outlet 41 is provided, a second opening 48, and a third opening 49 for drawing in the second power wiring 22. The end of the second electric conduit 32 is accommodated in the case 44 through the third opening 49.

[0044] The second opening 48 is provided for connection work for connecting the power outlet 41 and the second power wiring 22. In one example, in the case 44, the second opening 48 is provided on the surface opposite to the first opening 47. The second opening 48 is opened wide so that the connection between the wiring extending from the power outlet 41 and the second power wiring 22 can be easily made. In one example, the second opening 48 is larger than the first opening 47. The second opening 48 is sealed by a lid 48A. The third opening 49 is configured to allow the second electric conduit 32 through which the second power wiring 22 is inserted to enter. The third opening 49 is provided at the lower part of the case 44.

[0045] The case 44 is connected to the ground by the first ground wire 23. The ground terminal of the power outlet 41 is connected to the relay part 10 provided in the building main body 2 by the second ground wire 24. [Operation of the present embodiment] In the apartment house of the reference example, when using the charging stand 8 in the parking lot 5, it is necessary to conclude a contract with the operator who operates the charging stand 8. In the present embodiment, each charging stand 8 is associated with any one of the plurality of housing units 3. And the charging stand 8 is connected to the distribution board 15 of the associated housing unit 3 via the power wiring 20. Thereby, the electric vehicle 18 can be charged by the commercial power supplied to the housing unit 3 without concluding a contract with the operator who operates the charging system.

[0046] [Effect of the present embodiment] (1) The building 1 includes a building main body 2, a parking lot 5, and a charging stand 8. The charging stand 8 is provided in each of the plurality of parking sections 6 or in some of the preset plurality of parking sections 6. Each charging stand 8 is associated with any one of the plurality of housing units 3. Each charging stand 8 is connected to the distribution board 15 of the associated housing unit 3 via the power wiring 20.

[0047] According to this configuration, power can be supplied to the electric vehicle 18 connected from the distribution board 15 of the housing unit 3 to the charging stand 8. Therefore, the electric vehicle 18 can be charged by the power supplied to the housing unit 3 without concluding a contract with the operator who operates the charging system.

[0048] (2) The cross-sectional area of the power wiring 20 is sized according to the power wiring length from the housing unit 3 to the charging stand 8 associated with the housing unit 3. In the present embodiment, the power wiring 20 includes a first power wiring 21 and a second power wiring 22. The cross-sectional area of the first power wiring 21 is sized according to the power wiring length of the power wiring 20, and the cross-sectional area of the second power wiring 22 is sized according to the power wiring length of the power wiring 20. And the first power wiring 21 and the second power wiring 22 constituting the power wiring 20 are configured such that their cross-sectional areas are equal to each other.

[0049] In an apartment building, the length of the power wiring 20 connecting the dwelling unit 3 to the charging station 8 differs for each dwelling unit 3. Therefore, if the cross-sectional area of ​​the power wiring 20 connecting the dwelling unit 3 to the charging station 8 is the same for each dwelling unit 3, variations in power distribution losses will occur when supplying power from the dwelling unit 3 to the electric vehicle 18 via the charging station 8. In this respect, the above configuration makes it possible to suppress variations in power distribution losses in each dwelling unit 3 when supplying power from the dwelling unit 3 to the electric vehicle 18 via the charging station 8.

[0050] (3-1) The cross-sectional area of ​​the power wiring 20 is set such that the voltage drop rate from the dwelling unit 3 to the charging station 8 associated with the dwelling unit 3 is less than or equal to a first value. In an apartment building, the length of the power wiring 20 connecting the dwelling unit 3 and the charging station 8 differs for each dwelling unit 3. Therefore, if the cross-sectional area of ​​the power wiring 20 connecting the dwelling unit 3 and the charging station 8 is the same for each dwelling unit 3, the longer the length of the power wiring 20, the greater the power distribution loss and the lower the voltage at the charging station 8. In this respect, with the above configuration, the voltage drop rate is less than or equal to a first value. This makes it possible to suppress the voltage drop at the charging station 8. Therefore, it is possible to suppress situations in which the charging time of the electric vehicle 18 is significantly longer compared to other sets due to the power wiring length of the power wiring 20 of a given dwelling unit 3 being longer than the power wiring length of the power wiring 20 of other dwelling units 3.

[0051] (3-2) In other examples, the cross-sectional area of ​​the power wiring 20 satisfies both the first and second requirements. The first requirement is that "the cross-sectional area of ​​the power wiring 20 is of a size corresponding to the length of the power wiring from the dwelling unit 3 to the charging station 8 associated with the dwelling unit 3." The second requirement is that "the cross-sectional area of ​​the power wiring 20 is set such that the voltage drop rate from the dwelling unit 3 to the charging station 8 associated with the dwelling unit 3 is less than or equal to a first value."

[0052] In this example, resources can be saved compared to the case where all of the multiple power lines 20 are made of the same type of cable with the same cross-sectional area so as to satisfy only the second requirement. The reason is as follows: The power lines 20 have different lengths. Therefore, in order to make all of the multiple power lines 20 be made of the same type of cable with the same cross-sectional area so as to satisfy the second requirement, it is necessary to select the other power lines 20 to match the size of the cross-sectional area of ​​the longest power line 20. This results in the need to use unnecessarily thick power lines 20 even for short power lines 20. In this case, the metal material of the power lines 20 is wasted. An example of such metal is copper. To reduce such waste, as described above, each of the multiple power lines 20 is configured such that the cross-sectional area of ​​the power line 20 satisfies both the first and second requirements. This helps to suppress the wasteful use of resources.

[0053] (4) In building 1, the power wiring 20 includes a first power wiring 21 extending from the dwelling unit 3 to the relay unit 10, and a second power wiring 22 extending from the relay unit 10 to the charging station 8. The second power wiring 22 is connected to the first power wiring 21 by the relay unit 10.

[0054] With this configuration, during the construction of building 1, the installation of the first power wiring 21 connected to each dwelling unit 3 of building 1 and the installation of the second power wiring 22 connected to each charging station 8 can be carried out separately.

[0055] (5) In building 1, the conduit 30 comprises a first conduit 31 that protects the first power wiring 21 and a second conduit 32 that protects the second power wiring 22. The second conduit 32 is buried underground with the second power wiring 22 inserted through it. The charging station 8 comprises a charging outlet 41 to which the second power wiring 22 is connected and a case 44 through which the second conduit 32 can be inserted. The end of the second conduit 32 is housed in the case 44. With this configuration, the second power line can be properly protected at the point where it emerges from the ground to the surface.

[0056] (6) The charging stand 8 is provided with a base 45 that supports the case 44. The base 45 is made of concrete. The base 45 covers the lower part of the case 44 of the charging stand 8 and the portion of the second conduit 32 that extends from the case 44 into the ground.

[0057] With this configuration, the lower part of the case 44 and the portion of the second conduit 32 that protrudes from the case 44 are fixed with concrete. As a result, if the electric vehicle 18 collides with the charging station 8, the charging station 8 is less likely to tip over.

[0058] (7) The case 44 of the charging stand 8 includes a first opening 47 in which a charging outlet 41 is provided, a second opening 48 for connection work to connect the charging outlet 41 and the second power wiring 22, and a third opening 49 for drawing in the second power wiring 22. With this configuration, since the second opening 48 for connection work is provided in the case 44, the work efficiency of the connection work can be improved.

[0059] (8) In the building 1, the case 44 of the charging station 8 is connected to the ground by a first ground wire 23. The charging outlet 41 is connected to the relay unit 10 provided in the main building 2 by a second ground wire 24. With this configuration, if a leakage current occurs, events caused by the leakage current can be suppressed. One example of such an event is electric shock.

[0060] <Modifications> The above embodiment is an example of the forms that building 1 can take, and is not intended to limit its form. Building 1 may take a form different from the form exemplified in the above embodiment. Examples include forms in which some of the configurations of the embodiment are replaced, modified, or omitted, or forms in which new configurations are added to the embodiment. Modifications of the embodiment are shown below.

[0061] As shown in Figure 4, the charging station 8 may have a discharge outlet 42 in addition to the charging outlet 41. The discharge outlet 42 is configured to accept a discharge cable. In this case, the power wiring 50 for discharge includes a first power wiring 51 and a second power wiring 52, similar to the power wiring 20 for charging. The first power wiring 51 extends from the dwelling unit 3 to the relay unit 10. The second power wiring 52 extends from the relay unit 10 to the charging station 8. The first power wiring 51 is connected to a switching device 54 in the dwelling unit 3. The switching device 54 is connected to the first power wiring 51, the relay power wiring 55 extending from the distribution board 15, and the in-dwelling power wiring 27. The switching device 54 switches the in-dwelling power wiring 27 between the first power wiring 51 and the relay power wiring 55. This makes it possible to switch the power supply source to the in-dwelling power wiring 27 between the commercial power supply 13 and the electric vehicle 18. If the commercial power supply 13 experiences a power outage, the in-house power wiring 27 and the first power wiring 51 are connected. This allows power to be supplied from the electric vehicle 18 to the electrical equipment 16. The case 44 of the charging station 8 is configured to house the power wiring 20 for charging and the power wiring 50 for discharging.

[0062] In the above embodiment, a charging station 8 is provided for each parking space 6. However, a charging station 8 may be provided for a predetermined number of parking spaces 6. For example, in a parking lot 5, one charging station 60 may be provided for two adjacent parking spaces 6. The charging station 60 includes two charging stations 8. The charging station 60 can be considered as two charging stations 8 integrated together. One dwelling unit 3 is associated one-to-one with one of the charging stations 8 within the charging station 60. Another dwelling unit 3 is associated one-to-one with the other charging station 8 within the charging station 60.

[0063] In this case, as shown in Figure 5, the charging station 60 has two charging outlets 41. The charging station 8 is installed between two parking spaces 6. The charging station 60 can charge two electric vehicles 18 simultaneously. The case 44 of the charging station 8 is configured to house two power lines 20 for charging.

[0064] This specification discloses the following technology: [Appendix 1] Appendix 1 is a building for human use. The building comprises a building body including a plurality of dwelling units, a parking lot including a plurality of parking spaces, and charging stations. The charging stations are provided in each of the plurality of parking spaces, or in a predetermined number of the plurality of parking spaces. Each of the charging stations is associated with one of the plurality of dwelling units and is connected to the distribution board of the associated dwelling unit via power wiring.

[0065] [Note 2] In the building described in Note 1, the cross-sectional area of ​​the power wiring is the size corresponding to the length of the power wiring from the dwelling unit to the charging station associated with the dwelling unit.

[0066] [Note 3] In the building described in Note 1, the cross-sectional area of ​​the power wiring is set such that the voltage drop rate from the dwelling unit to the charging station associated with the dwelling unit is less than or equal to a first value.

[0067] [Note 4] In the building described in Note 1, a relay section is further provided in the main building. The power wiring comprises a first power wiring extending from the dwelling unit to the relay section, and a second power wiring extending from the relay section to the charging station. The second power wiring is connected to the first power wiring by the relay section.

[0068] [Note 5] In the building described in Note 4, a conduit for protecting the power wiring is further provided. The conduit comprises a first conduit for protecting the first power wiring and a second conduit for protecting the second power wiring. The second conduit is buried underground with the second power wiring inserted through it. The charging station comprises a charging outlet to which the second power wiring is connected and a case through which the second conduit can be inserted. The end of the second conduit is housed in the case.

[0069] [Note 6] In the building described in Note 5, the charging station further comprises a base for supporting the case. The base is made of concrete and covers the lower part of the case of the charging station and the portion of the second conduit that emerges from the case into the ground.

[0070] [Note 7] In the building described in Note 5, the case of the charging station comprises a first opening in which the charging outlet is provided, a second opening for connection work to connect the charging outlet and the second power wiring, and a third opening for bringing in the second power wiring.

[0071] [Note 8] In the building described in Note 5, the case of the charging station is connected to the ground by a first ground wire. The charging outlet is connected to a relay section provided in the main building by a second ground wire.

[0072] 1...Building, 2...Main building, 3...Dwelling unit, 5...Parking lot, 6...Parking space, 8...Charging station, 10...Intermediate unit, 15...Distribution board, 20...Power wiring, 21...First power wiring, 22...Second power wiring, 23...First ground wire, 24...Second ground wire, 30...Conduit, 31...First conduit, 32...Second conduit, 41...Charging outlet, 44...Case, 45...Base, 47...First opening, 48...Second opening, 49...Third opening, 50...Power wiring, 51...First power wiring, 52...Second power wiring.

Claims

1. A building for human use, comprising: a building body including a plurality of dwelling units; a parking lot including a plurality of parking spaces; and charging stations provided in each of the plurality of parking spaces, or in a predetermined number of the plurality of parking spaces, wherein each of the charging stations is associated with any one of the plurality of dwelling units and is connected via power wiring to the distribution board of the associated dwelling unit.

2. The building according to claim 1, wherein the cross-sectional area of ​​the power wiring is of a size corresponding to the length of the power wiring from the dwelling unit to the charging station associated with the dwelling unit.

3. The building according to claim 1, wherein the cross-sectional area of ​​the power wiring is set such that the voltage drop rate from the dwelling unit to the charging station associated with the dwelling unit is less than or equal to a first value.

4. The building according to any one of claims 1 to 3, further comprising a relay section provided in the main body of the building, wherein the power wiring comprises a first power wiring extending from the dwelling unit to the relay section and a second power wiring extending from the relay section to the charging station, and the second power wiring is connected to the first power wiring by the relay section.

5. The building according to claim 4, further comprising a conduit for protecting the power wiring, wherein the conduit comprises a first conduit for protecting the first power wiring and a second conduit for protecting the second power wiring, the second conduit is buried underground with the second power wiring inserted through it, the charging station comprises a charging outlet to which the second power wiring is connected and a case through which the second conduit can be inserted, and the end of the second conduit is housed in the case.

6. The building according to claim 5, wherein the charging stand further comprises a base for supporting the case, the base being made of concrete and covering the lower part of the case of the charging stand and the portion of the second conduit that emerges from the case into the ground.

7. The building according to claim 5 or 6, wherein the case of the charging stand comprises a first opening in which the charging outlet is provided, a second opening for connection work to connect the charging outlet and the second power wiring, and a third opening for drawing in the second power wiring.

8. The building according to any one of claims 5 to 7, wherein the case of the charging stand is connected to the ground by a first ground wire, and the charging outlet is connected to a relay section provided in the building body by a second ground wire.

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