building

Abstract

The present invention provides a building that has multiple dwelling units and in which electric vehicles can be charged using the electricity supplied to the dwelling units. [Solution] Building 1 is a building used by people. Building 1 comprises a building body 2 including multiple dwelling units 3, a parking lot 5 including multiple parking spaces 6, and a charging station 8. The charging station 8 is provided at each of the multiple parking spaces 6, or at some predetermined locations of the multiple parking spaces 6. Each charging station 8 is associated with one of the multiple dwelling units 3 and is connected to the distribution board 15 of the associated dwelling unit 3 via power wiring 20.

Description

Technical Field

[0006] ,

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

Background Art

[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.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

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

Means for Solving the Problems

[0005] (1) The building that solves the above problems is a building used by people, including a building body including a plurality of residential units, a parking lot including a plurality of parking sections, and charging stands 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 residential units and is connected to the distribution board of the associated residential unit via power wiring.

[0006] This configuration allows electricity to be supplied from the distribution panel in each dwelling unit to an electric vehicle connected to a charging station. Therefore, electric vehicles can be charged using the electricity supplied to the dwelling unit without needing to contract with a company that 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.

[0008] 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, there will be variations in power distribution losses when supplying power from each dwelling unit to an electric vehicle via the charging station. In this respect, the above configuration can suppress variations in power distribution losses in each dwelling unit when supplying power from each dwelling unit to an electric vehicle via the charging station.

[0009] (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.

[0010] 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.

[0011] (4) In a building described in any one of (1) to (3) above, the building further comprises a relay section provided in the building body, 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.

[0012] 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.

[0013] (5) In the building described in (4) above, a conduit for protecting the power wiring is further provided, the conduit comprising a first conduit for protecting the first power wiring and a second conduit for protecting the second power wiring, the second conduit being buried underground with the second power wiring inserted through it, the charging station comprising 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 being 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.

[0014] (6) In a building as 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.

[0015] 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.

[0016] (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 bringing 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.

[0017] (8) In the building according to any one of (5) to (7) above, the case of the charging stand is connected to the ground by a first ground wire, and the power outlet is connected to a relay section provided in the building main body by a second ground wire. According to this configuration, in the case of leakage, events caused by the leakage can be suppressed.

Effect of the Invention

[0018] According to the building of the present disclosure, it has a plurality of residential units, and an electric vehicle can be charged by the power supplied to the residential units.

Brief Description of the Drawings

[0019] [Figure 1] It is a schematic diagram of a building according to an embodiment. [Figure 2] In the building according to the embodiment, it is a schematic diagram showing a wiring system of one residential unit. [Figure 3] It is a schematic diagram of a charging stand. [Figure 4] It is a schematic diagram showing another example of a wiring system of one residential unit. [Figure 5] It is a schematic diagram showing another example of a charging stand.

Mode for Carrying Out the Invention

[0020] Referring to FIGS. 1 to 5, the building 1 of the present embodiment will be described. In the present embodiment, the parking lot 5 is an element of the building 1. In the present embodiment, the electric vehicle 18 is a vehicle that moves by the power stored in the battery by charging. Specifically, the electric vehicle 18 includes a BEV (Battery Electric Vehicle) and a PHEV (Plug-in Hybrid Electric Vehicle).

[0021] The building 1 is a building used by people. The building 1 includes a building main body 2, a parking lot 5, and a charging stand 8. The building 1 further includes a relay section 10 provided in the building main body 2. The building 1 further includes an electric wire pipe 30.

[0022] [Building main body] As shown in FIG. 1, in the present embodiment, the building main body 2 is an apartment house. The building main body 2 includes a plurality of dwelling units 3. In the present embodiment, one dwelling unit 3 is associated one-to-one with one parking section 6. Also, one dwelling unit 3 is associated one-to-one with a charging stand 8 provided in the parking section 6. Therefore, the resident of one dwelling unit 3 exclusively owns one parking section 6 associated with that dwelling unit 3 and one charging stand 8 associated with that dwelling unit 3.

[0023] The building main body 2 draws power from a commercial power source 13 via a switchboard 14. The plurality of dwelling units 3 receive power from the switchboard 14.

[0024] As shown in FIG. 2, the dwelling unit 3 has a distribution board 15. The distribution board 15 of each dwelling unit 3 is connected to the switchboard 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. Also, the distribution board 15 supplies power to the charging stand 8 associated one-to-one with the dwelling unit 3. The charging stand 8 associated one-to-one with the dwelling unit 3 is connected to the distribution board 15 via a power wiring 20.

[0025] A watt-hour meter 19 for measuring the power consumption is connected to the distribution board 15. The watt-hour meter 19 measures the amount of power consumed downstream of the distribution board 15. Specifically, the watt-hour meter 19 measures the total amount of power used in the dwelling unit 3 and the amount of power supplied from the distribution board 15 to the charging stand 8 for charging the electric vehicle 18. Thereby, the total amount of power used by the resident can be grasped. Another watt-hour meter 19 may be connected to the power wiring 20 described later. Thereby, the amount of power used for charging the electric vehicle 18 can be grasped.

[0026] [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.

[0027] Parking lot 5 includes multiple parking spaces 6. Each parking space 6 is partitioned to accommodate one car. In this embodiment, the parking spaces 6 are demarcated by white lines placed on the paved ground.

[0028] In one example, parking lot 5 consists of multiple rows 5A. Row 5A consists 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.

[0029] [Power wiring] Referring to Figures 1 and 2, the power wiring 20 connecting the dwelling unit 3 and the charging station 8 associated with 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.

[0030] The relay unit 10 has multiple 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 multiple terminals 10A.

[0031] [Structure of power wiring] In this embodiment, the distribution board 15 of dwelling unit 3 supplies power to the electric vehicle 18 in the same way that it supplies power to the electrical equipment 16 in dwelling unit 3. The distance from the distribution board 15 of dwelling unit 3 to the charging station 8 is significantly greater than the distance from the distribution board 15 of dwelling unit 3 to the electrical equipment 16 inside dwelling unit 3. Due to the large distance from the distribution board 15 of dwelling unit 3 to the charging station 8, 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 dwelling unit 3 and the charging station 8 has a different structure from the in-dwelling unit power wiring 27 inside dwelling unit 3. The electrical equipment 16 is connected to the in-dwelling unit power wiring 27. The structure of the power wiring 20 connecting the distribution board 15 of dwelling unit 3 and the charging station 8 is described below.

[0032] 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%.

[0033] 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.

[0034] 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 composed of the same type of cable with the same diameter, the power distribution loss would differ in each dwelling unit 3. To suppress such variations in power distribution loss, the multiple power lines 20 have the following configuration.

[0035] The cross-sectional area of ​​the power wiring 20 is proportional to the length of the power wiring from dwelling unit 3 to the charging station 8 associated with dwelling unit 3. Therefore, the longer the power wiring length, the larger the cross-sectional area of ​​the power wiring 20.

[0036] Let's describe a specific power wiring 20. In a single 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. Furthermore, 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.

[0037] As described above, each of the multiple power lines 20 is configured 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%.

[0038] [Conduit] The conduit 30 protects the power wiring 20. The conduit 30 is configured to allow the power wiring 20 to pass through.

[0039] As shown in Figure 2, 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.

[0040] 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.

[0041] [Charging stand] The charging station 8 is a facility for charging an electric vehicle 18. The charging station 8 has a charging outlet 41. The charging outlet 41 is configured to accept a charging cable 43.

[0042] Each charging station 8 is associated with one of the multiple dwelling units 3. Each charging station 8 is also connected to the distribution board 15 of the associated dwelling unit 3 via power wiring 20.

[0043] In this embodiment, a charging station 8 is provided in each of the multiple parking spaces 6. The charging station 8 has one charging outlet 41. One power line 20 is connected to the charging station 8.

[0044] As shown in Figure 3, the charging stand 8 includes a charging outlet 41 to which the second power wiring 22 is connected, and a case 44 through which the second power wiring 22 and the second conduit 32 can be inserted. The charging stand 8 further includes a base 45 that supports the case 44.

[0045] The base 45 is made of concrete. The base 45 covers the lower part of the case 44 of the charging station 8 and the portion of the second conduit 32 that emerges from the case 44 into the ground. Crushed stone 45A is laid beneath the base 45.

[0046] The case 44 includes a first opening 47 through which a charging outlet 41 is provided, a second opening 48, and a third opening 49 for bringing in the second power wiring 22. The end of the second conduit 32 is housed in the case 44 through the third opening 49.

[0047] The second opening 48 is provided for connecting the charging outlet 41 and the second power wiring 22. In one example, in the case 44, the second opening 48 is located on the side opposite to the first opening 47. The second opening 48 is large to facilitate the connection of the wiring extending from the charging outlet 41 to the second power wiring 22. In one example, the second opening 48 is larger than the first opening 47. The second opening 48 is sealed by a cover 48A. The third opening 49 is configured to accommodate the second conduit 32 through which the second power wiring 22 is inserted. The third opening 49 is located at the bottom of the case 44.

[0048] Case 44 is connected to the ground by a first ground wire 23. The ground terminal of the charging outlet 41 is connected to a relay section 10 provided in the building body 2 by a second ground wire 24.

[0049] [Operation of this embodiment] In the example apartment building, using the charging station 8 in parking lot 5 requires a contract with the operator of the charging station 8. In this embodiment, each charging station 8 is associated with one of the multiple dwelling units 3. The charging station 8 is then connected to the distribution board 15 of the associated dwelling unit 3 via power wiring 20. This allows electric vehicles 18 to be charged using commercial power supplied to the dwelling unit 3 without having to contract with an operator of the charging system.

[0050] [Effects of this embodiment] (1) The building 1 comprises a building body 2, a parking lot 5, and a charging station 8. The charging station 8 is provided in each of the multiple parking spaces 6, or in some predetermined locations of the multiple parking spaces 6. Each charging station 8 is associated with one of the multiple dwelling units 3. Each charging station 8 is connected to the distribution board 15 of the associated dwelling unit 3 via power wiring 20.

[0051] With this configuration, power can be supplied from the distribution board 15 in dwelling unit 3 to the electric vehicle 18 connected to the charging station 8. Therefore, the electric vehicle 18 can be charged using the power supplied to dwelling unit 3 without having to contract with a company that operates the charging system.

[0052] (2) The cross-sectional area of ​​the power wiring 20 is sized according to the length of the power wiring from the dwelling unit 3 to the charging station 8 associated with the dwelling unit 3. In this embodiment, the power wiring 20 comprises 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 length of the power wiring 20, and the cross-sectional area of ​​the second power wiring 22 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.

[0053] In an apartment building, the length of the power wiring 20 connecting each 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 each dwelling unit 3 to the charging station 8 is the same, there will be variations in power distribution losses when supplying power from each dwelling unit 3 to the electric vehicle 18 via the charging station 8. In this regard, the above configuration can suppress variations in power distribution losses in each dwelling unit 3 when supplying power from each dwelling unit 3 to the electric vehicle 18 via the charging station 8.

[0054] (3-1) 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.

[0055] In an apartment building, the length of the power wiring 20 connecting each 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 each dwelling unit 3 to the charging station 8 is the same, the longer the power wiring 20, the greater the power distribution loss and the lower the voltage at the charging station 8. In this respect, the above configuration ensures that the voltage drop rate is less than or equal to the first value. This suppresses voltage drop at the charging station 8. Therefore, it is possible to prevent situations where the charging time of an electric vehicle 18 is significantly longer compared to other groups due to the power wiring length of a particular dwelling unit 3 being longer than that of other dwelling units 3.

[0056] (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 the size corresponding to the length of the power wiring from dwelling unit 3 to the charging station 8 associated with 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 dwelling unit 3 to the charging station 8 associated with dwelling unit 3 is less than or equal to a first value."

[0057] This example shows that 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 so 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.

[0058] (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.

[0059] 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.

[0060] (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.

[0061] (6) The charging station 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 station 8 and the portion of the second conduit 32 that extends from the case 44 into the ground.

[0062] 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. Therefore, if the electric vehicle 18 collides with the charging station 8, the charging station 8 is less likely to tip over.

[0063] (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 connection work can be improved.

[0064] (8) In 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 a 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.

[0065] <Variation> The above embodiments are illustrative of possible forms of Building 1 and are not intended to limit its form. Building 1 may take forms different from those illustrated in the above embodiments. Examples include forms in which some of the configurations of the embodiments are replaced, modified, or omitted, or forms in which new configurations are added to the embodiments. Modifications of the embodiments are shown below.

[0066] 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, like the power wiring 20 for charging, comprises a first power wiring 51 and a second power wiring 52. 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 allows the power supply source to the in-dwelling power wiring 27 to be switched between the commercial power supply 13 and the electric vehicle 18. If the commercial power supply 13 fails, 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.

[0067] In the above embodiment, a charging station 8 is provided for each parking space 6. In contrast, 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 in the charging station 60. Another dwelling unit 3 is associated one-to-one with the other charging station 8 in the charging station 60.

[0068] 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 wirings 20 for charging.

[0069] This specification discloses the following technologies: [Note 1] Note 1 refers to a building used by people. The building comprises a building body including multiple dwelling units, a parking lot including multiple parking spaces, and charging stations. The charging stations are provided at each of the multiple parking spaces, or at some predetermined locations within the multiple parking spaces. Each charging station is associated with one of the multiple dwelling units and is connected to the distribution board of the associated dwelling unit via power wiring.

[0070] [Note 2] In the building described in Appendix 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.

[0071] [Note 3] In the building described in Appendix 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.

[0072] [Note 4] In the building described in Appendix 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.

[0073] [Note 5] In the building described in Appendix 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.

[0074] [Note 6] In the building described in Appendix 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.

[0075] [Note 7] In the building described in Appendix 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.

[0076] [Note 8] In the building described in Appendix 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 body of the building by a second ground wire. [Explanation of symbols]

[0077] 1...Building, 2...Main building, 3...Dwelling unit, 5...Parking lot, 6...Parking space, 8...Charging station, 10...Intermediate section, 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 used by people, The main building, which includes multiple dwelling units, A parking lot that includes multiple parking spaces, The system includes a charging station provided in each of the plurality of parking spaces, or in some of the predetermined locations of the plurality of parking spaces, Each of the aforementioned 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. architecture.

2. The cross-sectional area of ​​the power wiring is such that it corresponds to the length of the power wiring from the dwelling unit to the charging station associated with the dwelling unit. The building described in claim 1.

3. 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. The building described in claim 1.

4. Furthermore, the building body is equipped with a relay section, The power wiring comprises a first power wiring extending from the dwelling unit to the relay unit, and a second power wiring extending from the relay unit to the charging station. The second power wiring is connected to the first power wiring by the relay section. The building described in claim 1.

5. Furthermore, it is equipped with a conduit to protect the power wiring, 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 stand comprises a charging outlet through 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. The building according to claim 4.

6. The charging stand 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 stand and the portion of the second conduit that emerges from the case into the ground. The building according to claim 5.

7. The case of the charging stand is The 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, The device comprises a third opening for drawing in the second power cable, The building according to claim 5.

8. The case of the charging stand is connected to the ground by a first ground wire. The charging outlet is connected to a relay section provided in the building body by a second ground wire. The building according to claim 5.

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