Electrical equipment

Abstract

To provide a power device that suppresses an induction voltage (induction noise) generated in a low voltage circuit.SOLUTION: A power device 10 for receiving an external power or supplying an internal power to the outside comprises: an external connection part 40 connected with the outside to receive the external power or to supply the internal power to the outside; power conversion units 44 which are arranged at higher positions than a position of the external connection part and convert the external power or the internal power; and multiple power storage units 22 which are arranged at positions different from each other in height and receive the external power converted by the power conversion units or supply the internal power to the power conversion units.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an electric power device that receives an external power supply or supplies internal power to an external device. [Background technology]

[0002] Patent Document 1 discloses a battery exchange device for charging a battery. The battery exchange device is provided with a slot for accommodating a battery, and a terminal for connecting to the terminal of the battery and charging the battery is provided on the wall surface at the bottom of the slot. The terminal is connected to a charger such as an inverter via a cable.

[0003] Patent Document 2 discloses a battery charging device for charging batteries. The battery charging device includes a plurality of battery boxes capable of housing batteries, and a control unit disposed above the plurality of battery boxes to control charging of the batteries housed in the battery boxes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4479977 [Patent Document 2] Patent No. 3904740 Summary of the Invention [Problem to be solved by the invention]

[0005] In such a power device, a relatively high-voltage circuit portion (hereinafter also referred to as a high-voltage circuit) and a relatively low-voltage circuit portion (hereinafter also referred to as a low-voltage circuit) are arranged. The high-voltage circuit includes high-voltage wiring for receiving external power or for supplying internal power to the outside, and high-voltage circuit components. The low-voltage circuit includes low-voltage wiring such as communication lines for communicating with each part in the power device, and low-voltage circuit components.

[0006] In this case, if the high-voltage circuit and the low-voltage circuit are close to each other, electromagnetic coupling between the high-voltage circuit and the low-voltage circuit will cause an induced current to flow in the low-voltage circuit, generating an induced voltage (induced noise), which may result in the low-voltage circuit malfunctioning.

[0007] The present invention has been made to solve the above problems, and has an object to provide a power device capable of suppressing the generation of induced voltage (inductive noise) in a low-voltage circuit. [Means for solving the problem]

[0008] An aspect of the present invention is a power device that receives a supply of external power or supplies internal power to the outside, and includes an external connection unit that is connected to the outside to receive the supply of external power or supply the internal power to the outside, a power conversion unit that is positioned at a higher position than the external connection unit and converts the external power or the internal power, and a plurality of power storage units that are positioned at different heights and are supplied with the external power converted by the power conversion unit or supply the internal power to the power conversion unit. Effect of the Invention

[0009] According to the present invention, the external connection part of the high-voltage circuit, the power conversion part that performs power conversion between the high-voltage circuit side and the low-voltage circuit side, and the multiple power storage parts of the low-voltage circuit are arranged separately in the power device, which makes it possible to suppress the generation of induced voltage (induced noise) caused by an induced current flowing in the low-voltage circuit. [Brief description of the drawings]

[0010] [Figure 1] 1 is an external perspective view of a power device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a front view of the power device of FIG. [Diagram 3] 3 is a front view showing a state in which the front surface of the housing in FIG. 2 has been removed. [Figure 4] FIG. 2 is an enlarged front view illustrating two power storage units. [Diagram 5] FIG. 5 is a side view of the power storage unit of FIG. [Figure 6] FIG. 2 is a circuit diagram of the power device of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a power device according to the present invention will be described with reference to the accompanying drawings.

[0012] [1. Configuration of this embodiment] Fig. 1 is a perspective view of the appearance of the electric power device 10 according to the present embodiment, and Fig. 2 is a front view of the electric power device 10.

[0013] The power device 10 is a charging device that houses multiple batteries 12 therein and charges the multiple batteries 12. At least one of the multiple batteries 12 is a mobile battery that can be attached to and detached from the power device 10. In other words, the power device 10 can be used as a battery exchange machine that accepts a mobile battery with a low remaining capacity (SOC) and receives another mobile battery that has been fully charged. The power device 10 can also be used as a discharging device that outputs (supplies) the power (internal power) stored in the multiple batteries 12 to the outside.

[0014] The power device 10 has a housing 14 having a substantially rectangular parallelepiped shape. Eight openings 18 are formed in a front surface 16 of the housing 14. Each opening 18 communicates with a slot 20 in the housing 14. In this embodiment, as shown in Figs. 1 to 4, the power device 10 is provided with a total of eight slots 20 (four rows and two columns), four in the vertical direction and two in the horizontal direction. Therefore, the battery 12 is set (held) in the slot 20 by inserting or removing the battery 12 into or from the slot 20 through the openings 18.

[0015] As shown in Fig. 3, the housing 14 is configured so that the front surface 16 can be removed. In this embodiment, it is sufficient if there are a plurality of slots 20. As shown in Figs. 1 to 6, the battery 12 set in the slot 20 and the slot 20 constitute a power storage unit 22 that receives (stores) external power or outputs (discharges) internal power. Furthermore, the housing 14 may have doors (not shown) that open and close each opening 18.

[0016] Indicators 24 are provided on the front surface 16 of the housing 14 near the multiple openings 18. The indicators 24 indicate the charging state of the batteries 12 housed in the slots 20, the availability of the slots 20, etc., by lighting up in a certain color, blinking, etc. Furthermore, an operation panel 26 is provided above the multiple openings 18 on the front surface 16 of the housing 14. The operation panel 26 is a device that is operated by a user. The user operates the operation panel 26 to, for example, pay a fee for charging the battery 12, etc.

[0017] In the following explanation, the configuration of the power device 10 will be described based on the X-axis, Y-axis, and Z-axis defined as follows. As shown in Figs. 2 to 4, when the power device 10 is viewed from the front, that is, when the front surface 16 of the housing 14 is viewed, the depth direction of the power device 10 is defined as the X-axis direction, and the front surface 16 side is defined as the positive side. The width direction of the power device 10 is defined as the Y-axis direction, and the right side when viewed from a position facing the front surface 16 of the housing 14 is defined as the positive side. Furthermore, the vertical direction of the power device 10 is defined as the Z-axis direction, and the upper side is defined as the positive side.

[0018] FIG. 3 is a front view showing the inside of the power device 10 with the front surface 16 of the housing 14 (see FIGS. 1 and 2) removed. Inside the housing 14, a base 28 is installed at the bottom. A plurality of support columns 30 stand from the base 28 in the Z-axis direction. Four monocoque cases 32 are attached to the left and right support columns 30 at a predetermined interval in the Z-axis direction. Two hollow portions 34 that open in the X-axis direction are formed on the left and right of each monocoque case 32. The two hollow portions 34 are provided with slots 20 that extend in the X-axis direction and can accommodate the battery 12. Support plates 36 extending in the horizontal direction (X-axis direction and Y-axis direction) are attached to the left and right support columns 30 above the plurality of monocoque cases 32. A top plate 38 extending in the horizontal direction is attached to the upper ends of the left and right support columns 30.

[0019] An external connection unit 40 serving as an external connection connector connectable to an external connection line (not shown) is provided on the lower portion of the base 28. When connected to the external connection line, the external connection unit 40 receives a supply of external power from the outside via the external connection line, or outputs (supplies) internal power to the outside via the external connection line.

[0020] A breaker 42 is attached to the bottom of the top plate 38. A plurality of inverters 44 (power conversion units) are arranged on the upper surface of the support plate 36. Each of the plurality of inverters 44 corresponds to each of the plurality of slots 20 (power storage units 22). Therefore, the same number of inverters 44 as the number of slots 20 are arranged on the support plate 36. In addition, a main control board 46 which is an integrated control unit for controlling each slot 20, and an inverter 48 for the main control board 46 are also arranged on the support plate 36.

[0021] Therefore, inside the housing 14, from bottom to top, the external connection part 40, multiple power storage parts 22 (batteries 12, slots 20), multiple inverters 44, 48, a main control board 46, and a breaker 42 are arranged in order at positions of different heights.

[0022] Inside the housing 14, the external connection unit 40 and the breaker 42 are electrically connected via a high-voltage power line 50. In this case, the high-voltage power line 50 extends upward from the external connection unit 40 and is connected to the breaker 42, as described below. That is, the high-voltage power line 50 extends upward from the external connection unit 40 inside the base 28. The high-voltage power line 50 extends upward from the upper surface of the base 28 so as to avoid the multiple power storage units 22.

[0023] Specifically, the high-voltage power line 50 extends upward from the upper surface of the base 28 along the left support pillar 30 in front view (horizontal view) in Figures 2 and 3. In this case, the high-voltage power line 50 extends upward along the left support pillar 30 at a certain distance from each monocoque case 32 so as to avoid the multiple monocoque cases 32 (two power storage units 22). The high-voltage power line 50 then curves inwardly of the housing 14 in a position in front of the top plate 38, and is connected to the breaker 42 so as to avoid the multiple inverters 44, 48.

[0024] 2 and 3, the high-voltage power line 50 is disposed on the left side (one side) of the multiple power storage units 22, i.e., on the left side (one side) of the two left and right power storage units 22 disposed in the monocoque case 32. The high-voltage power line 50 can be fixed at any position using a cable fastener 52 to avoid being in close proximity to the multiple monocoque cases 32 and the multiple power storage units 22. As an example, FIGS. 2 and 3 show a case in which the high-voltage power line 50 is fixed to the left support pole 30 using the cable fastener 52 at a position near the inverter 44 of the left support pole 30.

[0025] The breaker 42 and the multiple inverters 44, 48 are electrically connected via a high-voltage side power line 54. The area from the external connection unit 40 to the multiple inverters 44 constitutes a high-voltage circuit 56. The high-voltage circuit 56 is a relatively high-voltage circuit portion in the power device 10. The breaker 42 is a high-voltage breaker, and when an excessive voltage exceeding a predetermined threshold occurs in the high-voltage circuit 56, it cuts off the conduction between the external connection unit 40 side and the multiple inverters 44, 48 side to protect the power device 10.

[0026] AC power flows through the high-voltage circuit 56. That is, when the power device 10 receives a supply of external power, relatively high-voltage AC power is supplied to the multiple inverters 44, 48 via the external connection unit 40, the high-voltage power line 50, the breaker 42, and the high-voltage power line 54. Each inverter 44, 48 converts the AC power into relatively low-voltage DC power and outputs it to the multiple power storage units 22 or the main control board 46. When the power device 10 outputs internal power to the outside, the multiple inverters 44 convert the DC power supplied from the multiple power storage units 22 into AC power and output the converted AC power to the outside via the high-voltage power line 54, the breaker 42, the high-voltage power line 50, and the external connection unit 40.

[0027] Meanwhile, the sections from the multiple inverters 44, 48 to the multiple power storage units 22 and main control board 46 constitute a low-voltage circuit 58. The low-voltage circuit 58 is a relatively low-voltage circuit portion in the power device 10. In the low-voltage circuit 58, the multiple inverters 44 and the multiple power storage units 22 are electrically connected by low-voltage side power lines 60. The low-voltage side power lines 60 extend downward from the multiple inverters 44 so as not to be close to the high-voltage circuit 56, as described below, and are connected to the corresponding power storage units 22.

[0028] Specifically, the low-voltage side power line 60 extends slightly downward from the inverter 44, curves at the support plate 36, and extends toward the right support pillar 30. The low-voltage side power line 60 curves downward at the right support pillar 30 and extends downward along the Z-axis direction. In this case, the low-voltage side power line 60 extends downward along the right support pillar 30 at a certain distance from each monocoque case 32 so as to avoid the multiple monocoque cases 32 (two power storage units 22).

[0029] Furthermore, the low-voltage side power line 60 curves near the lower right corner of the monocoque case 32 in which the power storage unit 22 corresponding to the connected inverter 44 is arranged, and extends leftward below the monocoque case 32. The low-voltage side power line 60 then curves at a location below the corresponding power storage unit 22, and extends upward to be connected to the power storage unit 22.

[0030] Further, the right-side inverter 48 is connected to the main control board 46 and the multiple power storage units 22 via a low-voltage side power line 62. In this case, the low-voltage side power line 62 extending from the right-side inverter 48 to the multiple power storage units 22 extends to and is connected to the power storage units 22 via a route similar to that of the low-voltage side power lines 60 extending from the eight inverters 44 to the multiple power storage units 22.

[0031] Furthermore, the main control board 46 and the plurality of power storage units 22 are connected to each other via communication lines 64. In this case, the communication lines 64 extend to and are connected to the power storage units 22 through paths similar to those of the low-voltage power lines 60 extending from each inverter 44 to the power storage units 22.

[0032] 2 and 3, the multiple low-voltage side power lines 60, 62 and the multiple communication lines 64 are arranged on the right side (the other side) of the multiple power storage units 22, i.e., on the right side (the other side) of the two left and right power storage units 22 arranged in the monocoque case 32. Furthermore, the multiple low-voltage side power lines 60, 62 and the multiple communication lines 64 are arranged facing downward on the right side of the multiple power storage units 22. For this reason, it is desirable to arrange the multiple low-voltage side power lines 60, 62 and the multiple communication lines 64 in a bundled manner, for example, as in a wire harness 66.

[0033] Fig. 4 is an enlarged front view of two power storage units 22 on the left and right sides arranged in one monocoque case 32. Fig. 5 is a side view of the power storage units 22. Fig. 6 is a circuit configuration diagram of the power device 10. In Fig. 6, the thick line portion is a high-voltage circuit 56, and the thin line portion is a low-voltage circuit 58. In addition, in the description of Fig. 6, detailed description of the components of the power device 10 that have already been described will be omitted.

[0034] 4, of the two power storage units 22, the power storage unit 22 on the left side (one side) close to the high-voltage side power line 50 is connected to the low-voltage side power lines 60, 62 and the communication line 64 on the right side of a midpoint 68 of the power storage unit 22 in order to avoid the high-voltage side power line 50 from being close to the low-voltage side power lines 60, 62 and the communication line 64. Specifically, when the width (length) of the power storage unit 22 in the Y-axis direction is Lyb, the closest distance Lyc between the high-voltage side power line 50 and the low-voltage side power lines 60, 62 and the communication line 64 in the Y-axis direction is set so that the closest distance Lyc between the high-voltage side power line 50 and the low-voltage side power lines 60, 62 and the communication line 64 in the Y-axis direction is longer than half the width Lyb (Lyc>Lyb / 2). In other words, the distance between the high-voltage side power line 50 and the low-voltage side power lines 60, 62 and the communication line 64 in the Y-axis direction may be equal to or greater than the closest distance Lyc. It should be noted that with respect to the location of the high-voltage side power line 50 near the external connection portion 40, it is sufficient that a distance equal to or greater than the closest distance Lyc is ensured.

[0035] As shown in Figures 5 and 6, each of the multiple power storage units 22 has a slot-side substrate 70 as a power storage control unit arranged on the back side of the slot 20 (negative side in the X-axis direction), a DC / DC converter 72, and a fan 74.

[0036] 5, the low-voltage power lines 60 extending from the multiple inverters 44, the low-voltage power lines 62 extending from the inverters 48, and the communication lines 64 extend below the power storage unit 22 to the negative side in the X-axis direction, curve near the back side of the slot 20, and extend upward, thereby entering the power storage unit 22. In this case, the low-voltage power lines 60 extending from the multiple inverters 44 are electrically connected to a DC / DC converter 72. The DC / DC converter 72 is connected via a cable 75 to a connector 76 arranged on the back side of the slot 20. The connector 76 is connected to a connector 78 on the battery 12 side.

[0037] Furthermore, the low-voltage side power line 62 and the communication line 64 extending from the inverter 48 are electrically connected to a slot-side board 70. The slot-side board 70 is connected to a DC / DC converter 72, a fan 74, and an indicator 24 via a cable 80. Furthermore, the slot-side board 70 is connected to the battery 12 via a cable 82 and connectors 76, 78.

[0038] In this case, the main control board 46 and the slot side board 70 are driven by receiving DC power supplied from the inverter 48 via the low-voltage power line 62. The main control board 46 also transmits and receives signals to and from the slot side board 70 via the communication line 64. Specifically, the main control board 46 transmits control signals for controlling the power storage units 22 to the slot side boards 70 of the multiple power storage units 22 via the communication line 64.

[0039] Each slot side board 70 controls the DC / DC converter 72 based on a control signal received via the communication line 64. As a result, the DC power from the inverter 44 is converted into the desired DC power by the DC / DC converter 72, and the converted DC power is supplied to the battery 12 via the cable 75 and the connectors 76 and 78. As a result, the battery 12 is charged. In addition, by converting the DC power from the battery 12 into the desired DC power by the DC / DC converter 72, the converted DC power is supplied to the inverter 44 via the low-voltage side power line 60. As a result, the internal power can be output (discharged) from the battery 12.

[0040] Each slot-side board 70 also drives a fan 74 based on the control signal to cool the battery 12. Furthermore, each slot-side board 70 acquires information about the battery 12 (battery voltage, battery temperature, SOC) from the battery 12 via connectors 76, 78 and a cable 82. Furthermore, the slot-side board 70 causes the indicator 24 to perform necessary display. The slot-side board 70 transmits the information acquired from the battery 12, the control results within the power storage unit 22, etc., to the main control board 46 via the communication line 64.

[0041] In the above description, the arrangement of the high-voltage side power line 50, the low-voltage side power lines 60, 62, and the communication line 64 when the multiple power storage units 22 and the two left and right power storage units 22 are viewed from the front in Fig. 2 and Fig. 3. In this embodiment, when the power device 10 is viewed horizontally, that is, in a front view, rear view, or side view, the high-voltage side power line 50 may be arranged on one side of the multiple power storage units 22 and the two power storage units 22 arranged side by side in the horizontal direction, and the low-voltage side power lines 60, 62, and the communication line 64 may be arranged on the other side.

[0042] 2 and 3, the present embodiment is not limited to the case where the high-voltage side power line 50, the low-voltage side power lines 60, 62, and the communication line 64 are arranged on the left and right. The high-voltage side power line 50 may be arranged in front of the plurality of power storage units 22, and the low-voltage side power lines 60, 62, and the communication line 64 may be arranged on the rear side of the plurality of power storage units 22. Also, the high-voltage side power line 50, the low-voltage side power lines 60, 62, and the communication line 64 may be arranged near diagonal positions of the plurality of power storage units 22 (monocoque case 32) in a plan view. In either case, the high-voltage side power line 50 and the low-voltage side power lines 60, 62, and the communication line 64 are separated from each other in a horizontal view, and the high-voltage side power line 50 is arranged on one side of the plurality of power storage units 22 and the two power storage units 22 arranged side by side in the horizontal direction, and the low-voltage side power lines 60, 62, and the communication line 64 are arranged on the other side.

[0043] In the above description, the multiple inverters 44 serve as the power conversion unit. In the present embodiment, when the power device 10 receives DC power (external power) from the outside or outputs DC power (internal power) to the outside, multiple DC / DC converters may be interposed between the high voltage circuit 56 and the low voltage circuit 58 instead of the multiple inverters 44, and the multiple DC / DC converters may function as the power conversion unit.

[0044] [2. Effects of this embodiment] As described above, the power device 10 of this embodiment is a power device 10 that receives a supply of external power or supplies internal power to the outside, and includes an external connection unit 40 that receives a supply of external power or supplies internal power to the outside by connecting to the outside, an inverter 44 (power conversion unit) that is arranged at a position higher than the external connection unit 40 and converts power, and a plurality of power storage units 22 that are arranged at different heights and are supplied with external power converted by the inverter 44 or supply internal power to the inverter 44.

[0045] In this manner, external connection unit 40 of high-voltage circuit 56, inverter 44 that performs power conversion between the high-voltage circuit 56 side and the low-voltage circuit 58 side, and multiple power storage units 22 of low-voltage circuit 58 are arranged separately within power device 10. This makes it possible to suppress an induced current from flowing in low-voltage circuit 58 and causing an induced voltage (induced noise).

[0046] Furthermore, by clearly separating the high voltage circuit 56 and the low voltage circuit 58 as described above, maintenance of the power device 10 becomes easier and a layout can be realized that takes into consideration measures against flooding and electric shock.

[0047] In this case, external connection unit 40 is disposed at a position lower than the multiple power storage units 22, and the multiple inverters 44 are disposed at a position higher than the multiple power storage units 22. This allows high voltage circuit 56 and low voltage circuit 58 to be more clearly separated, making maintenance even easier.

[0048] The power device 10 further includes a high-voltage side power line 50 connecting the external connection unit 40 and the multiple inverters 44, and a low-voltage side power line 60 connecting the multiple inverters 44 and the multiple power storage units 22. In this case, the multiple power storage units 22 are arranged side by side in the Z-axis direction (vertical direction), the high-voltage side power line 50 is arranged on one side of the multiple power storage units 22 when viewed in the horizontal direction, and the low-voltage side power line 60 is arranged on the other side of the multiple power storage units 22 when viewed in the horizontal direction. This makes it possible to easily separate the high-voltage side power line 50 and the low-voltage side power line 60, so that generation of induced voltage (induced noise) in the low-voltage circuit 58 can be effectively suppressed.

[0049] Furthermore, the multiple power storage units 22 include two power storage units 22 arranged at the same height, with the high-voltage side power line 50 arranged on one side of the two power storage units 22 as viewed in the horizontal direction, and the low-voltage side power line 60 arranged on the other side of the two power storage units 22 as viewed in the horizontal direction. This makes it possible to increase the distance between the high-voltage side power line 50 and the low-voltage side power line 60, thereby further suppressing the generation of induced voltage (induced noise) in the low-voltage circuit 58.

[0050] Here, of the two power storage units 22, one of the power storage units 22 is connected to the low-voltage power line 60 on the other side of a midpoint 68 of the one of the power storage units 22. As a result, when the low-voltage power line 60 is connected to the one of the power storage units 22 adjacent to the high-voltage power line 50, the high-voltage power line 50 and the low-voltage power line 60 are arranged with a certain interval between them, so that the generation of induced voltage (induced noise) can be easily suppressed.

[0051] Moreover, the high-voltage side power line 50 and the low-voltage side power line 60 are arranged such that the closest distance Lyc between the high-voltage side power line 50 and the low-voltage side power line 60 is longer than half the horizontal width (length) Lyb of the power storage unit 22 (Lyc>Lyb / 2). This makes it possible to further suppress the generation of induced voltage (induced noise).

[0052] Moreover, the power device 10 further includes a plurality of slot side boards 70 (power storage control unit) that are provided near the plurality of power storage units 22 and control the plurality of power storage units 22, and a main control board 46 (integrated control unit) that controls the plurality of slot side boards 70. This makes it possible to appropriately control the plurality of power storage units 22 while suppressing generation of induced voltage (induction noise) in the low-voltage circuit 58.

[0053] Moreover, the power device 10 further includes a communication line 64 that connects the main control board 46 and the multiple slot side boards 70. In this case, the main control board 46 is disposed at a position higher than the multiple power storage units 22, and the communication line 64 is disposed to the right (the other side) of the multiple power storage units 22 when viewed in the horizontal direction. This makes it possible to transmit and receive signals between the main control board 46 and the multiple slot side boards 70 while suppressing the generation of induced voltage (inductive noise) in the communication line 64.

[0054] In this case, the communication line 64 is disposed near the low-voltage side power line 60. This makes it possible to easily realize a layout that suppresses the generation of induced voltage (induced noise).

[0055] Moreover, the communication lines 64 and the low-voltage side power lines 60 are arranged in a bundled state, which makes it possible to effectively utilize the space within the power device 10 and suppress the generation of induced voltage (induced noise).

[0056] The power device 10 further includes a housing 14 that houses the external connection unit 40, the inverter 44, the multiple power storage units 22, the high-voltage side power line 50, and the low-voltage side power line 60. The housing 14 is configured such that a front surface 16 (either side surface) facing horizontally can be detached. In this case, the high-voltage side power line 50 is disposed on one side of the multiple power storage units 22 when viewed in a direction perpendicular to the front surface 16 (when viewed from the front), and the low-voltage side power line 60 is disposed on the other side of the multiple power storage units 22 when viewed from the front. This allows an operator to easily visually confirm both the high-voltage side power line 50 and the low-voltage side power line 60 when the front surface 16 is removed from the housing 14 during maintenance. As a result, the maintainability of the power device 10 is further improved.

[0057] It is needless to say that the present invention is not limited to the above-described embodiment, and various modifications are possible. [Explanation of symbols]

[0058] 10... Power device 22... Power storage unit 40...External connection section 44...Inverter (power conversion section)

Claims

1. A power device that receives external power or supplies internal power to an external device, an external connection unit that is connected to an external device to receive the external power or to supply the internal power to the external device; a power conversion unit that is disposed at a position higher than the external connection unit and converts the external power or the internal power; a plurality of power storage units arranged at different heights and supplied with the external power converted by the power conversion unit or supplied with the internal power by the power storage units; Equipped with the external connection portion is disposed at a position lower than the plurality of power storage units, the power conversion unit is disposed at a higher position than the plurality of power storage units, the power device further includes a high-voltage side power line connecting the external connection unit and the power conversion unit, and a low-voltage side power line connecting the power conversion unit and the power storage unit, The plurality of power storage units are arranged in a vertical direction, the high-voltage side power line is arranged on one side of the plurality of power storage units when viewed in a horizontal direction, The low-voltage power line is disposed on the other side of the plurality of power storage units when viewed in a horizontal direction.

2. 2. The power device according to claim 1, The plurality of power storage units include two power storage units arranged at the same height, the high-voltage side power line is arranged on one side of the two power storage units when viewed in a horizontal direction, The low-voltage power line is disposed on the other side of the two power storage units when viewed in a horizontal direction.

3. 3. The power device according to claim 2, a power device, wherein the one of the two power storage units is connected to the low-voltage power line on the other side of a midpoint of the one of the power storage units;

4. In the power device according to any one of claims 1 to 3, the high-voltage side power line and the low-voltage side power line are arranged such that a closest distance between the high-voltage side power line and the low-voltage side power line is longer than half the horizontal length of the power storage unit.

5. In the power device according to any one of claims 1 to 4, a plurality of power storage control units provided near the plurality of power storage units and controlling the plurality of power storage units; An integrated control unit that controls the plurality of power storage control units; The power device further comprises:

6. 6. The power device according to claim 5, a communication line connecting the integrated control unit and the plurality of power storage control units; the integrated control unit is disposed at a position higher than the plurality of power storage units, The communication line is arranged on the other side of the plurality of power storage units when viewed in a horizontal direction.

7. 7. The power device according to claim 6, The communication line is disposed near the low-voltage power line.

8. 8. The power device according to claim 7, The communication line and the low-voltage side power line are arranged in a bundle.

9. In the power device according to any one of claims 1 to 8, a housing that houses the external connection unit, the power conversion unit, the plurality of power storage units, the high-voltage side power line, and the low-voltage side power line; The housing is configured so that any one of the horizontally facing sides is detachable, the high-voltage side power line is arranged on the one side of the plurality of power storage units when viewed in a direction perpendicular to the side surface, The low-voltage power line is arranged on the other side of the plurality of power storage units when viewed in a direction perpendicular to the side surface.

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