Power supply mat

Abstract

To keep the parasitic inductance of a connector that connects power transmission coil units to a low level.SOLUTION: A power supply mat 100 is configured by connecting power transmission coil units 1 to each other by a connector 8. A first energizing plate 81 of a connector 8 includes a first connecting region 81A on one end side thereof, which causes power supply members 3 of the power transmission coil unit 1 to be energized, and a second energizing plate 82 includes a second connection region 82A on the other end side, which causes the power supply members 3 of the power transmission coil unit 1 to be energized. A first opposing region 81B on the other end side of the first energizing plate 81 and a second opposing region 82B on the one end side of the second energizing plate 82 are opposite to each other, and when the power transmission coil units 1 are connected to each other by the connector 8 and the power supply members 3 are energized, the direction of the current flowing through the first energizing plate 81 and the direction of the current flowing through the second energizing plate 82 are opposite to each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power supply mat.

Background Art

[0002] Patent Document 1 discloses a conventional power supply mat (power transmission device) for non-contact power supply, which is configured to be able to transmit power to a vehicle in a non-contact manner, and is a sheet-like plurality of power transmission coil units connected by a power supply line.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a power supply line is used as a connector for connecting power transmission coil units as in the conventional power supply mat described above, if an attempt is made to expand the power supply mat, as the expansion scale increases, the total length of the power supply line increases, so the influence of the parasitic inductance of the power supply line becomes large. As a result, the resonance frequency of the power transmission coil unit may deviate from a preset desired resonance frequency (for example, the resonance frequency of a power receiving coil unit possessed by a power supply target such as a moving body), and there is a risk that the transmission efficiency will decrease.

[0005] The present invention has been made paying attention to such problems, and an object thereof is to suppress the parasitic inductance of a connector for connecting power transmission coil units to a low level.

Means for Solving the Problems

[0006] To solve the above problems, according to one aspect of the present invention, a power supply mat is provided in which power transmission coil units for contactless power supply are connected by a connector. Each power transmission coil unit comprises a power transmission coil and a power supply member that supplies power to the power transmission coil. The connector comprises a first energizing plate and a second energizing plate arranged to face each other with an insulating layer in between. The first energizing plate has a first connection area on one end thereof, which electrically connects the power supply member of one power transmission coil unit and the power supply member of the other power transmission coil unit when connecting the two power transmission coil units, thereby energizing both power supply members. The second energizing plate has a second connection area on the other end opposite to the one end of the first energizing plate, which electrically connects the power supply member of one power transmission coil unit and the power supply member of the other power transmission coil unit when connecting the two power transmission coil units, thereby energizing both power supply members. The first energizing plate and the second energizing plate are arranged such that the first opposing region on the other end of the first energizing plate, excluding the first connection region, and the second opposing region on one end of the second energizing plate, excluding the second connection region, face each other via an insulating layer. When the power transmission coil units are connected by a connector and energized, the direction of the current flowing through the first energizing plate and the direction of the current flowing through the second energizing plate are opposite. [Effects of the Invention]

[0007] According to this aspect of the present invention, the direction of the current flowing through one end of the first energized plate and the other end of the second energized plate, which are facing each other via an insulating layer, can be reversed. Therefore, current can be flowed through both the first and second energized plates overall due to the proximity effect, while their directions are reversed. As a result, the magnetic field formed by the current flowing through one of the first or second energized plates can be canceled out by the magnetic field formed by the current flowing through the other of the first or second energized plates, thereby keeping the parasitic inductance of the connectors that connect the power transmission coil units low. [Brief explanation of the drawing]

[0008] [Figure 1]Figure 1 is a schematic perspective view of a power supply mat according to one embodiment of the present invention. [Figure 2] Figure 2 is a schematic exploded perspective view of a power transmission coil unit according to one embodiment of the present invention. [Figure 3] Figure 3 is a schematic perspective view of a substrate-type busbar according to one embodiment of the present invention. [Figure 4] Figure 4 is a schematic cross-sectional view of a substrate-type busbar along the line IV-IV in Figure 3. [Figure 5A] Figure 5A is a schematic perspective view showing some components of a substrate-type busbar according to one embodiment of the present invention. [Figure 5B] Figure 5B is a schematic perspective view showing some components of a substrate-type busbar according to one embodiment of the present invention. [Figure 6] Figure 6 shows a power supply mat in which power transmission coil units are connected to each other by connectors. [Figure 7] Figure 7 is a schematic perspective view of the connector. [Figure 8] Figure 8 is a schematic cross-sectional view of the connector in Figure 7 along the line VIII-VIII. [Figure 9] Figure 9 shows how the circuit board busbars of two power transmission coil units are connected using a connector. [Figure 10] Figure 10 shows that the direction of the current flowing through the first energizing plate and the direction of the current flowing through the second buoyancy plate are opposite. [Modes for carrying out the invention]

[0009] The embodiments will be described in detail below with reference to the drawings. In the following description, similar components will be given the same reference numeral.

[0010] Figure 1 is a schematic perspective view of a power supply mat 100 according to one embodiment of the present invention.

[0011] The power supply mat 100 is a mat configured to be able to transmit power supplied from a power source such as an external AC power source to a power supply target in a non-contact manner, and includes at least one sheet-like power transmission coil unit 1. The power supply target is not particularly limited as long as it has a power reception coil unit corresponding to the power transmission coil unit 1, and may be a moving body such as a vehicle or a micro pallet, or may be a communication device or a home appliance product.

[0012] As shown in FIG. 1, the power transmission coil unit 1 is configured to be able to be connected to each other, so that the power supply mat 100 can be freely expanded. Hereinafter, the details of the power transmission coil unit 1 will be described with reference to FIGS. 2 to 6.

[0013] FIG. 2 is a schematic exploded perspective view of the power transmission coil unit 1. In the following description, for convenience, among the front and back surfaces of the power transmission coil unit 1, the side on which the power supply target is arranged is referred to as the front side, and the opposite side is referred to as the back side.

[0014] The power transmission coil unit 1 includes one or a plurality of power transmission coils 2, a substrate-type bus bar 3 disposed below the power transmission coil 2, and a cover 4. At this time, a sheet-like ferrite can also be interposed between the power transmission coil 2 and the substrate-type bus bar 3.

[0015] The power transmission coil 2 forms a resonance circuit together with, for example, a capacitor (not shown), and performs non-contact power transmission by magnetic field resonance coupling (magnetic field resonance) to a power supply target disposed on the power transmission coil unit 1. The power transmission method is not limited to magnetic field resonance coupling, and other power transmission methods such as magnetic field coupling (electromagnetic induction), electric field coupling, and electric field resonance coupling (electric field resonance) may also be used. Nine power transmission coils 2 are shown in FIG. 2.

[0016] The substrate-type bus bar 3 is electrically connected to each of a power source (not shown) and the power transmission coil 2, and supplies the power supplied from the power source to the power transmission coil 2. The details of the substrate-type bus bar 3 will be described later with reference to FIGS. 3 to 6.

[0017] The cover 4 is disposed on the front side of the power transmission coil 2 and the back side of the substrate-type bus bar 3, respectively, to protect the power transmission coil 2 and the substrate-type bus bar 3. In the present embodiment, the cover 4 is composed of a flexible member so that the power transmission coil unit 1 can be wound or bent in a roll shape.

[0018] FIG. 3 is a schematic perspective view of the substrate-type bus bar 3. FIG. 4 is a schematic cross-sectional view of the substrate-type bus bar 3 taken along line IV-IV of FIG. 3. FIGS. 5A and 5B are schematic perspective views showing some components of the substrate-type bus bar 3, respectively.

[0019] As shown in FIG. 4, the substrate-type bus bar 3 includes a first metal plate 31, a second metal plate 32, a front-side insulating plate 33 disposed on the front side of the first metal plate 31, an intermediate insulating plate 34 disposed between the first metal plate 31 and the second metal plate 32, and a back-side insulating plate 35 disposed on the back side of the second metal plate 32. FIG. 5A is a perspective view showing a state in which the front-side insulating plate 33, the first metal plate 31, and the intermediate insulating plate 34 are removed from the substrate-type bus bar 3 (that is, a perspective view showing a state in which the back-side insulating plate 35 and the second metal plate 32 are laminated), and FIG. 5B is a perspective view showing a state in which only the front-side insulating plate 33 is removed from the substrate-type bus bar 3 (that is, a perspective view showing a state in which the back-side insulating plate 35, the second metal plate 32, the intermediate insulating plate 34, and the first metal plate 31 are laminated).

[0020] The substrate-type bus bar 3 is insulated from components (the power transmission coil 2 in the present embodiment) disposed on the front side of the substrate-type bus bar 3 by the front-side insulating plate 33, and similarly, is insulated from components (the cover 4 in the present embodiment) disposed on the back side of the substrate-type bus bar 3 by the back-side insulating plate 35. The first metal plate 31 and the second metal plate 32 are insulated from each other by the intermediate insulating plate 34 disposed between them.

[0021] As shown in Figure 3, the board-type busbar 3 includes a pair of power supply terminals 6 for supplying power from a power source to the board-type busbar 3, and a pair of power transmission coil connection terminals 7 for supplying the power supplied to the board-type busbar 3 to the power transmission coil 2 located on the front side of the board-type busbar 3. Figure 3 shows an example of a board-type busbar 3 that includes two sets of power supply terminals 6 and nine sets of power transmission coil connection terminals 7.

[0022] The power supply terminal 6 is used as a terminal for electrically connecting the board-type busbar 3, and by extension the power transmission coil unit 1, to the power source, and is also used as a terminal for electrically connecting the power transmission coil units 1 to each other when connecting them together.

[0023] One of the pair of power supply terminals 6 (hereinafter referred to as the "first power supply terminal") 6A is electrically connected to the first metal plate 31, and when the power transmission coil unit 1 is connected to a power source, it is electrically connected to one of the pair of output terminals for voltage application that the power source has, for example, via a power supply line. On the other hand, the other of the pair of power supply terminals 6 (hereinafter referred to as the "second power supply terminal") 6B is electrically connected to the second metal plate 32, and when the power transmission coil unit 1 is connected to a power source, it is electrically connected to the other of the pair of output terminals for voltage application that the power source has, for example, via a power supply line.

[0024] The power transmission coil connection terminal 7 is used as a terminal for electrically connecting the board-type busbar 3 to the power transmission coil 2.

[0025] One of the pair of power transmission coil connection terminals 7 (hereinafter referred to as the "first power transmission coil connection terminal") 7A is electrically connected to the first metal plate 31 and to one end of the power transmission coil 2. On the other hand, the other of the pair of power transmission coil connection terminals 7 (hereinafter referred to as the "second power transmission coil connection terminal") 7B is electrically connected to the second metal plate 32 and to the other end of the power transmission coil 2.

[0026] With this configuration, for example, when current is supplied to the first metal plate 31 from a power source such as an external AC power source via the first power supply terminal 6A, the current flows through the first metal plate 31 and is supplied from the first metal plate 31 to the power transmission coil 2 via the first power transmission coil connection terminal 7A. The current that has flowed through the power transmission coil 2 then flows into the second metal plate 32 via the second power transmission coil connection terminal, flows through the second metal plate 32 and returns to the power source from the second metal plate 32 via the second power supply terminal 6B. Naturally, when current is supplied from the power source to the second metal plate 32 via the second power supply terminal 6B, the current flow is reversed.

[0027] Furthermore, as shown in Figure 6, when connecting two power transmission coil units 1, the first power supply terminal 6A of one power transmission coil unit 1 (the power transmission coil unit 1 on the right in the figure) is electrically connected to the first power supply terminal 6A of the board-type busbar 3 of the other power transmission coil unit 1 (the power transmission coil unit 1 on the left in the figure) that is connected to the first power transmission coil unit 1, via the connector 8. Similarly, the second power supply terminal 6B is electrically connected to the second power supply terminal 6B of the board-type busbar 3 of the power transmission coil unit 1 that is connected, via the connector 8. Details of the connector 8 according to this embodiment will be described below with reference to Figures 7 to 10.

[0028] Figure 7 is a schematic perspective view of the connector 8. Figure 8 is a schematic cross-sectional view of the connector 8 in Figure 7 along the line VIII-VIII. Figure 9 shows how the circuit board type busbars 3 of two power transmission coil units 1 are connected by the connector 8.

[0029] As shown in Figures 7 and 8, the connector 8 is formed in a rectangular shape and comprises a first energizing plate 81, a second energizing plate 82, and an insulating plate 83. The connector 8 connects the power transmission coil units 1 together, electrically connecting the first power supply terminals 6A of both power transmission coil units 1, and consequently the first metal plates 31 of both units, as well as electrically connecting the second power supply terminals 6B of both power transmission coil units 1, and consequently the second metal plates 32 of both units.

[0030] In this embodiment, the connector 8 is made of thin metal plates or metal foils as the first conductive plate 81 and the second conductive plate 82, and a thin plastic film as the insulating plate 83, so that the connector 8 can be easily bent.

[0031] On the first energized plate 81, a pair of connection portions 811A and 811B are formed in a connection portion forming region 81A on one end in the longitudinal direction that is not in contact with the insulating plate 83. On the second energized plate 82, a pair of connection portions 821A and 821B are formed in a connection portion forming region 82A on the other end in the longitudinal direction that is not in contact with the insulating plate 83, that is, on the side opposite to the side on the first energized plate 81 where the pair of connection portions 811A and 811B are formed.

[0032] The first energized plate 81 and the second energized plate 82 are arranged so that some of their regions 81B and 82B face each other via an insulating plate 83. For convenience, if we refer to these opposing regions of the first energized plate 81 and the second energized plate 82 as "opposing regions," then the opposing region 81B of the first energized plate 81 is the region on the other end of the longitudinal direction of the first energized plate 81, excluding the connection portion forming region 81A. The opposing region 82B of the second energized plate 82 is the region on the one end of the longitudinal direction of the second energized plate 82, excluding the connection portion forming region 82A.

[0033] As shown in Figure 9, the connection portion 811A of the first energizing plate 81 is used to electrically connect the first energizing plate 81 to the first power supply terminal 6A of one of the power transmission coil units 1 when connecting two power transmission coil units 1. The connection portion 811B of the first energizing plate 81 is used to electrically connect the first energizing plate 81 to the first power supply terminal 6A of the other power transmission coil unit 1 when connecting two power transmission coil units 1.

[0034] The connection portion 821A of the second energizing plate 82 is used to electrically connect the second energizing plate 82 to the second power supply terminal 6B of one of the power transmission coil units 1 when connecting two power transmission coil units 1. The connection portion 821B of the second energizing plate 82 is used to electrically connect the second energizing plate 82 to the second power supply terminal 6B of the other power transmission coil unit 1 when connecting two power transmission coil units 1.

[0035] In this embodiment, the connection portion 811A and the connection portion 811B of the first energizing plate 81 are screw insertion holes, and by inserting a screw into the connection portion 811A and screwing the screw into the first power supply terminal 6A of one of the power transmission coil units 1, the first energizing plate 81 and, by extension, the connector 8 are fixed to the substrate-type busbar 3 of one of the power transmission coil units 1, and the first energizing plate 81 and the first metal plate 31 of one of the power transmission coil units 1 are electrically connected.

[0036] Furthermore, by inserting a screw into the connection part 811B and screwing the screw into the first power supply terminal 6A of the other power transmission coil unit 1, the first energizing plate 81, and consequently the connector 8, are fixed to the substrate-type busbar 3 of the other power transmission coil unit 1, and the first energizing plate 81 and the first metal plate 31 of the other power transmission coil unit 1 are electrically connected.

[0037] Furthermore, the connection portions 821A and 821B of the second energizing plate 82, like the connection portions 811A and 811B of the first energizing plate 81, are screw insertion holes. By inserting a screw into the connection portion 821A and screwing it into the second power supply terminal 6B of one of the power transmission coil units 1, the second energizing plate 82, and by extension the connector 8, is fixed to the substrate-type busbar 3 of one of the power transmission coil units 1, and the second energizing plate 82 and the second metal plate 32 of one of the power transmission coil units 1 are electrically connected.

[0038] Furthermore, by inserting a screw into the connection part 821B and screwing the screw into the second power supply terminal 6B of the other power transmission coil unit 1, the second current-carrying plate 82, and consequently the connector 8, is fixed to the substrate-type busbar 3 of the other power transmission coil unit 1, and the second current-carrying plate 82 and the second metal plate 32 of the other power transmission coil unit 1 are electrically connected. Note that the configurations of the connection parts 811A, 811B, 821A, 821B, the first power supply terminal 6A, and the second power supply terminal 6B shown in Figure 9 are merely examples, and their configurations are not limited to this configuration.

[0039] In this way, when the power transmission coil units 1 are connected by the connector 8, the first metal plates 31 of both power transmission coil units 1 are electrically connected to each other via the first energizing plate 81 of the connector 8, and the second metal plates 32 of both power transmission coil units 1 are electrically connected to each other via the second energizing plate 82 of the connector 8.

[0040] Therefore, for example, in Figure 9, if one of the power transmission coil units 1 on the right side of the figure is connected to a power source (AC power source), a portion of the current supplied to the first metal plate 31 of one of the power transmission coil units 1 will flow from the right side to the left side of the figure through the first power supply terminal 6A of one of the power transmission coil units 1, and will be supplied to the first metal plate 31 of the other power transmission coil unit 1 on the left side of the figure through the first power supply terminal 6A of the other power transmission coil unit 1.

[0041] The current supplied to the first metal plate 31 of the other power transmission coil unit 1 flows through the power transmission coil 2 of the other power transmission coil unit 1, returns to the second metal plate 32 of the other power transmission coil unit 1, flows through the second metal plate 32, then flows through the second power supply terminal B of the other power transmission coil unit 1 to the connector 8 from left to right in the diagram, and returns to the power source by flowing through the second metal plate 32 of the one power transmission coil unit 1 via the second power supply terminal 6B of the one power transmission coil unit 1. Naturally, when current is supplied from the power source to the second metal plate 32 of the one power transmission coil unit 1, the current flow is the reverse of this.

[0042] Thus, with the connector 8 according to this embodiment, the direction of the current flowing through the connection portion forming region 81A of the first energizing plate 81 and the direction of the current flowing through the connection portion forming region 82A of the second energizing plate 82 can be reversed.

[0043] In this case, the so-called proximity effect reduces the current flowing in the short-side direction in the connection portion forming region 81A at one end of the first energized plate 81, while increasing the current flowing in the short-side direction in the opposing region 81B at the other end of the first energized plate 81, which is close to the connection portion forming region 82A of the second energized plate 82. In other words, the proximity effect allows current to flow in the short-side direction not only in the connection portion forming region 81A of the first energized plate 81 but also in the opposing region 81B.

[0044] Furthermore, within the second energized plate 82, the current flowing in the shorter direction can be reduced in the connection portion forming region 82A at the other end, while the current flowing in the shorter direction can be increased in the opposing region 82B at one end of the second energized plate 82, which is closer to the connection portion forming region 81A of the first energized plate 81. In other words, due to the proximity effect, current can be allowed to flow in the shorter direction not only in the connection portion forming region 82A of the second energized plate 82 but also in the opposing region 82B.

[0045] As a result, as shown in Figure 10, it becomes possible to flow current in the short-side direction throughout the interior of the first energized plate 81 and the second energized plate 82, and the direction of the magnetic field formed by the current flowing through the first energized plate 81 (counterclockwise in the example of Figure 10) and the direction of the magnetic field formed by the current flowing through the second energized plate 82 (clockwise in the example of Figure 10) can be reversed.

[0046] As a result, the magnetic field formed by the current flowing through either the first energizing plate 81 or the second energizing plate 82 can be canceled out by the magnetic field formed by the current flowing through the other energizing plate 81 or the second energizing plate 82. Therefore, the parasitic inductance of the connector 8 that connects the power transmission coil units 1 can be reduced. Consequently, even if the scale of the power supply mat 100 is increased by connecting many power transmission coil units 1, the influence of the parasitic inductance of the connector 8 is small, so it is possible to suppress deviations of the resonant frequency of the power transmission coil unit 1 from a preset desired resonant frequency (for example, the resonant frequency of the power receiving coil unit of a power supply target such as a mobile object), thereby suppressing a decrease in transmission efficiency.

[0047] Furthermore, the shorter the distance between the first energized plate 81 and the second energized plate 82, that is, the thinner the insulating plate 83, the greater the magnetic field cancellation effect. Therefore, it is desirable to make the insulating plate 83 as thin as possible while still maintaining insulation between the first energized plate 81 and the second energized plate 82.

[0048] The power supply mat 100 according to this embodiment, as described above, is constructed by connecting power transmission coil units 1 for contactless power supply with a connector 8. Each power transmission coil unit 1 includes a power transmission coil 2 and a substrate-type busbar 3 (power supply member) that supplies power to the power transmission coil 2. The connector 8 includes a first energizing plate 81 and a second energizing plate 82 that are arranged to face each other via an insulating plate 83 (insulating layer).

[0049] The first energizing plate 81 has a connection portion forming region 81A (first connection region) on one end, where, when connecting two power transmission coil units 1, the substrate-type busbar 3 of one power transmission coil unit 1 and the substrate-type busbar 3 of the other power transmission coil unit 1 are electrically connected, allowing current to flow between the two substrate-type busbars 3. The second energizing plate 82 has a connection portion forming region 82A (second connection region) on the other end, opposite to the one end of the first energizing plate 81, where, when connecting two power transmission coil units 1, the substrate-type busbar 3 of one power transmission coil unit 1 and the substrate-type busbar 3 of the other power transmission coil unit 1 are electrically connected, allowing current to flow between the two substrate-type busbars 3.

[0050] Furthermore, the first energizing plate 81 and the second energizing plate 82 are arranged such that the opposing region 81B (first opposing region) on the other end side of the first energizing plate 81, excluding the connection portion forming region 81A (first connection region), and the opposing region 82B (second opposing region) on one end side of the second energizing plate 82, excluding the connection portion forming region 82A (second connection region), face each other via an insulating plate 83. When the power transmission coil units 1 are connected by the connector 8 and energized between the two substrate-type busbars 3, the direction of the current flowing through the first energizing plate 81 and the direction of the current flowing through the second energizing plate 82 are opposite.

[0051] Therefore, due to the so-called proximity effect, it becomes possible to flow current throughout the interior of the first energized plate 81 and the second energized plate 82 in the shorter direction, and the direction of the magnetic field formed by the current flowing through the first energized plate 81 and the direction of the magnetic field formed by the current flowing through the second energized plate 82 can be made opposite.

[0052] As a result, the magnetic field formed by the current flowing through either the first energizing plate 81 or the second energizing plate 82 can be canceled out by the magnetic field formed by the current flowing through the other energizing plate 81 or the second energizing plate 82, thereby reducing the parasitic inductance of the connector 8 that connects the power transmission coil units 1. Therefore, even if the scale of the power supply mat 100 is expanded by connecting many power transmission coil units 1, the effect of the parasitic inductance of the connector 8 is small, which suppresses deviation of the resonant frequency of the power transmission coil unit 1 from a preset desired resonant frequency (for example, the resonant frequency of the receiving coil unit of a power supply target such as a mobile object), thereby suppressing a decrease in transmission efficiency.

[0053] The substrate-type busbar 3 (power supply member) according to this embodiment specifically comprises a first metal plate 31 and a second metal plate 32 insulated via an intermediate insulating plate 34 (insulating layer), and a pair of power supply terminals 6 to which the first current-carrying plate 81 and the second current-carrying plate 82 of the connector 8 are connected. The substrate-type busbar 3 is configured such that when current is passed through either the first metal plate 31 or the second metal plate 32, the current is supplied to the power transmission coil 2 and flows from the power transmission coil 2 to the other of the first metal plate 31 or the second metal plate 32. Furthermore, one of the pair of power supply terminals 6, the first power supply terminal 6A, is electrically connected to the first metal plate 31, and the other, the second power supply terminal 6B, is electrically connected to the second metal plate 32.

[0054] Furthermore, the connector 8 according to this embodiment has, specifically, a pair of connection parts 811A and 811B in the connection part forming region 81A (first connection region) for connecting the first energizing plate 81 to the first power supply terminal 6A (first terminal) of the substrate-type busbar 3 of one power transmission coil unit 1 and to the first power supply terminal 6A (first terminal) of the substrate-type busbar 3 of the other power transmission coil unit 1. Furthermore, in the connection part forming region 82A (second connection region), a pair of connection parts 821A and 821B for connecting the second energizing plate 82 to the second power supply terminal 6B (second terminal) of the substrate-type busbar 3 of one power transmission coil unit 1 and to the second power supply terminal 6B (second terminal) of the substrate-type busbar 3 of the other power transmission coil unit 1.

[0055] When two power transmission coil units 1 are connected by a connector 8, the distance between them (the distance between the power transmission coil units 1) basically depends on the distance between a pair of connection parts 811A and 811B formed in the connection part forming region 81A of the first current-carrying plate 81 (the distance between the connection parts 811A and 811B in the short direction), or the distance between a pair of connection parts 821A and 821B formed in the connection part forming region 82A of the second current-carrying plate 82 (the distance between the connection parts 821A and 821B in the short direction). For example, in Figure 9, the longer the distance between the pair of connection parts 811A and 811B, the longer the distance between the two power transmission coil units 1 when they are connected (the distance between the power transmission coil units 1). Therefore, by configuring the connector 8 in this way and appropriately adjusting the distance between the pair of connecting parts 811A and 811B and the distance between the pair of connecting parts 821A and 821B, the distance between the two when the power transmission coil units 1 are connected by the connector 8 can be shortened.

[0056] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

[0057] For example, in this embodiment, as shown in Figures 3 and 6, power supply terminals 6 are provided at both the left and right ends of the board-type busbar 3, but they may also be provided at both the top and bottom ends. By doing so, the power transmission coil unit 1 can be connected not only to the left and right but also to the top and bottom, so that the power supply mat 100 can be expanded in all directions. [Explanation of Symbols]

[0058] 1. Power transmission coil unit 2. Transmission coil 3. Circuit board type busbar (power supply component) 6 Power supply terminal 6A 1st power supply terminal (1st terminal) 6B 2nd power supply terminal (2nd terminal) 8 Connectors 31 1st metal plate 32 Second metal plate 34. Intermediate insulating plate (insulating layer) 81 1st current carrying board 81A Connection area (first connection area) 81B Opposing area 82 2nd current carrying board 82A Connection area (second connection area) 82B Opposing area 83 Insulating board (insulating layer) 811A, 811B Pair of connection parts 821A, 821B Pair of connection parts

Claims

1. A power supply mat in which power transmission coil units for contactless power supply are connected by a connector, The aforementioned power transmission coil unit is Power transmission coil and A power supply member that supplies power to the power transmission coil, Equipped with, The aforementioned connector is It comprises a first energized plate and a second energized plate arranged to face each other with an insulating layer in between, The first energized plate is, One end of the power transmission coil unit has a first connection region to which the power supply member of one power transmission coil unit and the power supply member of the other power transmission coil unit are electrically connected when the two power transmission coil units are connected, thereby energizing both power supply members. The second energizing plate is, On the other end of the first current-carrying plate, opposite to one end, there is a second connection area to which the power supply member of one of the power transmission coil units and the power supply member of the other power transmission coil unit are electrically connected when the power transmission coil units are connected to each other, thereby energizing both power supply members. The first energized plate and the second energized plate are, The first opposing region on the other end side of the first current-carrying plate, excluding the first connection region, and the second opposing region on one end side of the second current-carrying plate, excluding the second connection region, are facing each other via the insulating layer. When the power transmission coil units are connected by the connector and current is supplied to both power supply members, the direction of the current flowing through the first current-carrying plate and the direction of the current flowing through the second current-carrying plate are opposite. Power supply mat.

2. The aforementioned power supply member is A first metal plate and a second metal plate insulated with an insulating layer, A pair of power supply terminals to which the first energizing plate and the second energizing plate of the connector are connected, Equipped with, The aforementioned power supply member is When an electric current is passed through either the first or second metal plate, the current is supplied to the power transmission coil and flows from the power transmission coil to the other of the first or second metal plate, and one of the pair of power supply terminals has a first terminal that is electrically connected to the first metal plate, and the other terminal has a second terminal that is electrically connected to the second metal plate. The power supply mat according to claim 1.

3. The aforementioned connector is The first connection region has a pair of connection parts for connecting the first energizing plate to the first terminal provided on the power supply member of one of the power transmission coil units and to the first terminal provided on the power supply member of the other power transmission coil unit, The second connection region has a pair of connection parts for connecting the second energizing plate to the second terminal provided on the power supply member of one of the power transmission coil units and to the second terminal provided on the power supply member of the other power transmission coil unit. The power supply mat according to claim 2.

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