Power supply system and mobile body

Abstract

To provide a power supply system having redundancy and a mobile body including such a power supply system.SOLUTION: A power supply system 10 includes: a first power supply circuit 12a that supplies a first loading device 16a with DC power output from a first power generator 14a; a second power supply circuit 12b that supplies a second loading device 16b with DC power output from a second power generator 14b; and a first connection circuit 18a including a first connection device 20a1 that connects a positive electrode of the first power supply circuit 12a and a positive electrode of the second power supply circuit 12b and a second connection device 20a2 that connects a negative electrode of the first power supply circuit 12a and a negative electrode of the second power supply circuit 12b. The first connection device 20a1 is provided on one end side of the first connection circuit 18a, and the second connection device 20a2 is provided on the other end side of the first connection circuit 18a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply system and a mobile body equipped with the power supply system. [Background technology]

[0002] In recent years, research and development has been conducted into electrification technologies that contribute to energy efficiency in order to ensure that more people have access to affordable, reliable, sustainable and advanced energy.

[0003] Patent Document 1 discloses an aircraft power supply system that can supply power to a load even in an emergency by combining a plurality of generators and storage batteries. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 6-3975 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a need for a more redundant power supply system and a mobile vehicle equipped with such a power supply system.

[0006] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0007] A first aspect of the present disclosure is a power supply system comprising: a first power supply circuit that supplies DC power output from a first power generation device to a first load device; a second power supply circuit that supplies DC power output from a second power generation device to a second load device; a first connection circuit that includes a first connection device that can connect the positive electrode of the first power supply circuit to the positive electrode of the second power supply circuit; and a second connection device that can connect the negative electrode of the first power supply circuit to the negative electrode of the second power supply circuit, wherein the first connection device is arranged on one end side of the first connection circuit and the second connection device is arranged on the other end side of the first connection circuit.

[0008] A second aspect of the present disclosure is a mobile object including the power supply system of the first aspect. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a power supply system and a mobile object with greater redundancy. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a first schematic diagram of a power supply system. [Figure 2] FIG. 2 is a second schematic diagram of the power supply system. [Figure 3] FIG. 3 is a diagram showing the operation of the power supply system in a normal state. [Figure 4] FIG. 4 is a diagram showing the operation of the power supply system when a first abnormality occurs. [Figure 5] FIG. 5 is a diagram showing the operation of the power supply system when a second abnormality occurs. [Figure 6] FIG. 6 is a schematic diagram of a power supply system of a comparative example. [Figure 7] FIG. 7 is a diagram for explaining the effect of the arrangement of the connection device of this embodiment. [Figure 8] FIG. 8 is a schematic diagram of a first modified example of the power supply system. [Figure 9] FIG. 9 is a schematic diagram of a second modified example of the power supply system. [Figure 10] FIG. 10 is a schematic diagram of a moving object. DETAILED DESCRIPTION OF THE INVENTION

[0011] [First embodiment] [Power supply system configuration] A power supply system 10 according to a first embodiment will be described with reference to the drawings. FIG. 1 is a first schematic diagram of the power supply system 10. As shown in FIG.

[0012] The power supply system 10 includes a first power supply circuit 12a, a second power supply circuit 12b, a third power supply circuit 12c, and a fourth power supply circuit 12d. The first power supply circuit 12a supplies DC power output from the first power generation device 14a to the first load device 16a. The second power supply circuit 12b supplies DC power output from the second power generation device 14b to the second load device 16b. The third power supply circuit 12c supplies DC power output from the first power generation device 14a to the third load device 16c. The fourth power supply circuit 12d supplies DC power output from the second power generation device 14b to the fourth load device 16d.

[0013] The first power supply circuit 12a includes a partial circuit 12a2 (second partial circuit) and a partial circuit 12a1 (first partial circuit) between the first power generation device 14a and the first load device 16a. For example, the partial circuit 12a2 and the partial circuit 12a1 are each provided in a distribution board or a junction box. The partial circuit 12a2 and the partial circuit 12a1 are connected to each other. The partial circuit 12a2 is connected to the first power generation device 14a. On the other hand, the partial circuit 12a1 is connected to the first load device 16a. The partial circuit 12a2 and the partial circuit 12a1 relay DC power between the first power generation device 14a and the first load device 16a. Hereinafter, a device including the partial circuit 12a2 and a circuit breaker 22a (second circuit breaker) described later will be referred to as a relay device 28 (second relay device). Similarly, a device including the partial circuit 12a1 and a circuit breaker 26a (first circuit breaker) described later will be referred to as a relay device 30 (first relay device).

[0014] The second power supply circuit 12b includes a partial circuit 12b2 (fourth partial circuit) and a partial circuit 12b1 (third partial circuit) between the second power generation device 14b and the second load device 16b. For example, the partial circuit 12b2 and the partial circuit 12b1 are each provided in a distribution panel or a junction box. The partial circuit 12b2 and the partial circuit 12b1 are connected to each other. The partial circuit 12b2 is connected to the second power generation device 14b. On the other hand, the partial circuit 12b1 is connected to the second load device 16b. The partial circuit 12b2 and the partial circuit 12b1 relay DC power between the second power generation device 14b and the second load device 16b. Hereinafter, a device including the partial circuit 12b2 and a circuit breaker 22b (fourth circuit breaker) described later will be referred to as a relay device 36 (fourth relay device). Similarly, a device including the partial circuit 12b1 and a circuit breaker 26b (third circuit breaker) described later will be referred to as a relay device 38 (third relay device).

[0015] The third power supply circuit 12c includes a partial circuit 12c2 and a partial circuit 12c1 between the first power generation device 14a and the third load device 16c. For example, the partial circuit 12c2 and the partial circuit 12c1 are each provided in a distribution panel or a junction box. The partial circuit 12c2 and the partial circuit 12c1 are connected to each other. The partial circuit 12c2 is connected to the first power generation device 14a. Meanwhile, the partial circuit 12c1 is connected to the third load device 16c. The partial circuit 12c2 and the partial circuit 12c1 relay DC power between the first power generation device 14a and the third load device 16c. Hereinafter, a device including the partial circuit 12c1 and a circuit breaker 26c (described later) will be referred to as a relay device 34. Meanwhile, the partial circuit 12c2 and the circuit breaker 22c (described later) are included in a relay device 28.

[0016] The fourth power supply circuit 12d includes a partial circuit 12d2 and a partial circuit 12d1 between the second power generation device 14b and the fourth load device 16d. For example, the partial circuit 12d2 and the partial circuit 12d1 are each provided in a distribution panel or a junction box. The partial circuit 12d2 and the partial circuit 12d1 are connected to each other. The partial circuit 12d2 is connected to the second power generation device 14b. Meanwhile, the partial circuit 12d1 is connected to the fourth load device 16d. The partial circuit 12d2 and the partial circuit 12d1 relay DC power between the second power generation device 14b and the fourth load device 16d. Hereinafter, a device including the partial circuit 12d1 and a circuit breaker 26d (described later) will be referred to as a relay device 42. Meanwhile, the partial circuit 12d2 and the circuit breaker 22d (described later) are included in a relay device 36.

[0017] The first power generating device 14a and the second power generating device 14b each have an engine, a generator, and a power control unit (not shown). The engine drives the generator, which generates three-phase AC power. The power control unit converts the three-phase AC power into DC power.

[0018] The first power generating device 14a and the second power generating device 14b may have various sensors such as a voltage sensor, a current sensor, etc. Furthermore, the first power generating device 14a and the second power generating device 14b may have various elements such as a fuse, a relay, a breaker, a diode, a transistor, a resistor, a coil, a capacitor, etc.

[0019] The first load device 16a, the second load device 16b, the third load device 16c, and the fourth load device 16d each have an inverter and an electric motor (not shown). The inverter converts input DC power into three-phase AC power, and the electric motor is driven by the three-phase AC power. The first load device 16a, the second load device 16b, the third load device 16c, and the fourth load device 16d may also have a DC / DC converter and a low-voltage drive device (not shown). The DC / DC converter reduces the voltage of the input DC power, and the low-voltage drive device is driven by the DC power.

[0020] The first load device 16a, the second load device 16b, the third load device 16c, and the fourth load device 16d may have various sensors such as a voltage sensor, a current sensor, etc. Furthermore, the first load device 16a, the second load device 16b, the third load device 16c, and the fourth load device 16d may have various elements such as a fuse, a relay, a breaker, a diode, a transistor, a resistor, a coil, and a capacitor.

[0021] The power supply system 10 includes a first connection circuit 18a. A first end (one end) of the first connection circuit 18a is connected to a partial circuit 12a1 of the first power supply circuit 12a. A second end (the other end) of the first connection circuit 18a is connected to a partial circuit 12b1 of the second power supply circuit 12b. The first connection circuit 18a includes a positive wiring 19a1 and a negative wiring 19a2. The positive wiring 19a1 is connected to the positive electrode of the partial circuit 12a1 and the positive electrode of the partial circuit 12b1. The negative wiring 19a2 is connected to the negative electrode of the partial circuit 12a1 and the negative electrode of the partial circuit 12b1. A first connection device 20a1 is disposed on the positive wiring 19a1. A second connection device 20a2 is disposed on the negative wiring 19a2. The first connection device 20a1 can connect the positive electrode of the partial circuit 12a1 to the positive electrode of the partial circuit 12b1, and the second connection device 20a2 can connect the negative electrode of the partial circuit 12a1 to the negative electrode of the partial circuit 12b1.

[0022] The first connection device 20a1 is disposed on the first end side of the first connection circuit 18a. In other words, the first connection device 20a1 is close to the partial circuit 12a1 of the first power supply circuit 12a and is separated from the partial circuit 12b1 of the second power supply circuit 12b. In other words, the distance between the first connection device 20a1 and the partial circuit 12a1 is shorter than the distance between the first connection device 20a1 and the partial circuit 12b1.

[0023] The second connection device 20a2 is disposed on the second end side of the first connection circuit 18a. In other words, the second connection device 20a2 is close to the partial circuit 12b1 of the second power supply circuit 12b and is separated from the partial circuit 12a1 of the first power supply circuit 12a. In other words, the distance between the second connection device 20a2 and the partial circuit 12b1 is shorter than the distance between the second connection device 20a2 and the partial circuit 12a1.

[0024] The power supply system 10 includes a second connection circuit 18b. A first end (one end) of the second connection circuit 18b is connected to a partial circuit 12c1 of the third power supply circuit 12c. A second end (the other end) of the second connection circuit 18b is connected to a partial circuit 12d1 of the fourth power supply circuit 12d. The second connection circuit 18b includes a positive wiring 19b1 and a negative wiring 19b2. The positive wiring 19b1 is connected to the positive electrode of the partial circuit 12c1 and the positive electrode of the partial circuit 12d1. The negative wiring 19b2 is connected to the negative electrode of the partial circuit 12c1 and the negative electrode of the partial circuit 12d1. A third connection device 20b1 is disposed on the positive wiring 19b1. A fourth connection device 20b2 is disposed on the negative wiring 19b2. The third connection device 20b1 may connect the positive electrode of the partial circuit 12c1 to the positive electrode of the partial circuit 12d1, and the fourth connection device 20b2 may connect the negative electrode of the partial circuit 12c1 to the negative electrode of the partial circuit 12d1.

[0025] The third connection device 20b1 is disposed on the first end side of the second connection circuit 18b. In other words, the third connection device 20b1 is close to the partial circuit 12c1 of the third power supply circuit 12c and is separated from the partial circuit 12d1 of the fourth power supply circuit 12d. In other words, the distance between the third connection device 20b1 and the partial circuit 12c1 is shorter than the distance between the third connection device 20b1 and the partial circuit 12d1.

[0026] The fourth connection device 20b2 is disposed on the second end side of the second connection circuit 18b. In other words, the fourth connection device 20b2 is close to the partial circuit 12d1 of the fourth power supply circuit 12d and is separated from the partial circuit 12c1 of the third power supply circuit 12c. In other words, the distance between the fourth connection device 20b2 and the partial circuit 12d1 is shorter than the distance between the fourth connection device 20b2 and the partial circuit 12c1.

[0027] The first connection device 20a1, the second connection device 20a2, the third connection device 20b1, and the fourth connection device 20b2 each have a switch. The switch may be configured by a relay or a contactor. The first connection device 20a1, the second connection device 20a2, the third connection device 20b1, and the fourth connection device 20b2 may further have a breaker.

[0028] Normally, the connection between the first power supply circuit 12a and the second power supply circuit 12b is cut off. This prevents an electrical abnormality from occurring in one of the first power supply circuit 12a and the second power supply circuit 12b from affecting the other of the first power supply circuit 12a and the second power supply circuit 12b. For example, if an overcurrent occurs in one of the first power supply circuit 12a and the second power supply circuit 12b, the overcurrent is prevented from flowing in the other of the first power supply circuit 12a and the second power supply circuit 12b.

[0029] Similarly, the connection between the third power supply circuit 12c and the fourth power supply circuit 12d is normally cut off. This prevents an electrical abnormality from occurring in one of the third power supply circuit 12c and the fourth power supply circuit 12d from affecting the other of the third power supply circuit 12c and the fourth power supply circuit 12d. For example, if an overcurrent occurs in one of the third power supply circuit 12c and the fourth power supply circuit 12d, the overcurrent is prevented from flowing in the other of the third power supply circuit 12c and the fourth power supply circuit 12d.

[0030] When the supply of power from the first power generating device 14a to the first power supply circuit 12a and the third power supply circuit 12c is cut off, the first power supply circuit 12a and the second power supply circuit 12b are connected by the first connection device 20a1 and the second connection device 20a2. Also, the third power supply circuit 12c and the fourth power supply circuit 12d are connected by the third connection device 20b1 and the fourth connection device 20b2. This allows power to be supplied from the second power generating device 14b to the first power supply circuit 12a and the third power supply circuit 12c.

[0031] When the supply of power from the second power generating device 14b to the second power supply circuit 12b and the fourth power supply circuit 12d is cut off, the first power supply circuit 12a and the second power supply circuit 12b are connected by the first connection device 20a1 and the second connection device 20a2. Also, the third power supply circuit 12c and the fourth power supply circuit 12d are connected by the third connection device 20b1 and the fourth connection device 20b2. This allows power to be supplied from the first power generating device 14a to the second power supply circuit 12b and the fourth power supply circuit 12d.

[0032] The power supply system 10 includes circuit breakers 22a to 22d. The circuit breaker 22a is disposed in the partial circuit 12a2 of the relay device 28. The circuit breaker 22a can disconnect the first power generation device 14a from the partial circuit 12a1 and the first connection circuit 18a. The circuit breaker 22b is disposed in the partial circuit 12b2 of the relay device 36. The circuit breaker 22b can disconnect the second power generation device 14b from the partial circuit 12b1 and the first connection circuit 18a. The circuit breaker 22c is disposed in the partial circuit 12c2 of the relay device 28. The circuit breaker 22c can disconnect the first power generation device 14a from the partial circuit 12c1 and the second connection circuit 18b. The circuit breaker 22d is disposed in the partial circuit 12d2 of the relay device 36. The circuit breaker 22d can disconnect the second power generation device 14b from the partial circuit 12d1 and the second connection circuit 18b.

[0033] Each of the circuit breakers 22a to 22d has a positive and negative switch. The switch may be configured by a relay or a contactor. The circuit breakers 22a to 22d may have a breaker.

[0034] The power supply system 10 includes a first power storage device 24a, a second power storage device 24b, a third power storage device 24c, and a fourth power storage device 24d. The first power storage device 24a is connected to the first power supply circuit 12a in parallel with the first power generation device 14a. The second power storage device 24b is connected to the second power supply circuit 12b in parallel with the second power generation device 14b. The third power storage device 24c is connected to the third power supply circuit 12c in parallel with the first power generation device 14a. The fourth power storage device 24d is connected to the fourth power supply circuit 12d in parallel with the second power generation device 14b.

[0035] The first power storage device 24a, the second power storage device 24b, the third power storage device 24c, and the fourth power storage device 24d include lithium ion batteries. The first power storage device 24a, the second power storage device 24b, the third power storage device 24c, and the fourth power storage device 24d may include secondary batteries other than lithium ion batteries. The first power storage device 24a, the second power storage device 24b, the third power storage device 24c, and the fourth power storage device 24d may include large-capacity capacitors.

[0036] The first power storage device 24a, the second power storage device 24b, the third power storage device 24c, and the fourth power storage device 24d may have various sensors such as a voltage sensor, a current sensor, etc. The first power storage device 24a, the second power storage device 24b, the third power storage device 24c, and the fourth power storage device 24d may have various elements such as a fuse, a relay, a breaker, a diode, a transistor, a resistor, a coil, and a capacitor.

[0037] The power supply system 10 includes circuit breakers 26a to 26d. Circuit breaker 26a is included in relay device 30. Circuit breaker 26a is arranged on the wiring connecting first power storage device 24a and partial circuit 12a1. Circuit breaker 26a can disconnect first power storage device 24a from partial circuit 12a1. Circuit breaker 26b is included in relay device 38. Circuit breaker 26b is arranged on the wiring connecting second power storage device 24b and partial circuit 12b1. Circuit breaker 26b can disconnect second power storage device 24b from partial circuit 12b1. Circuit breaker 26c is included in relay device 34. Circuit breaker 26c is arranged on the wiring connecting third power storage device 24c and partial circuit 12c1. Circuit breaker 26c can disconnect third power storage device 24c from partial circuit 12c1. The interrupting device 26d is included in the relay device 42. The interrupting device 26d is disposed on the wiring connecting the fourth power storage device 24d and the partial circuit 12d1. The interrupting device 26d can disconnect the fourth power storage device 24d from the partial circuit 12d1.

[0038] Each of the circuit breakers 26a to 26d has a positive and negative switch. The switch may be configured by a relay or a contactor. The circuit breakers 26a to 26d may have a breaker.

[0039] In addition to the configuration described above, the power supply system 10 may include various sensors such as a voltage sensor, a current sensor, etc. The power supply system 10 may also include elements such as a fuse, a resistor, a coil, a capacitor, etc.

[0040] [Layout of power supply system components] 2 is a second schematic diagram of the power supply system 10. The components that make up the power supply system 10 are distributed across multiple areas 44, 46, 48, 50, 52, and 54. Specifically, relay device 28, relay device 30, relay device 34, relay device 36, relay device 38, and relay device 42 are located in different areas.

[0041] Relay device 28 is arranged in area 44. Relay device 30 is arranged in area 46 (first area). Relay device 34 is arranged in area 48. Relay device 36 is arranged in area 50. Relay device 38 is arranged in area 52 (second area). Relay device 42 is arranged in area 54.

[0042] The first connection device 20a1 is arranged in area 46 together with the relay device 30. The second connection device 20a2 is arranged in area 52 together with the relay device 38. The third connection device 20b1 is arranged in area 48 together with the relay device 34. The fourth connection device 20b2 is arranged in area 54 together with the relay device 42.

[0043] The areas 44, 46, 48, 50, 52, and 54 are separated from one another by partition walls 60. For example, two adjacent areas, such as area 44 and area 46 shown in FIG. 2, may be separated by a common partition wall 60. Alternatively, the areas 44, 46, 48, 50, 52, and 54 may be separated from one another by different partition walls 60. The partition walls 60 are preferably made of a flame-retardant material, but are not limited to this.

[0044] [Operation of the power supply system under normal conditions] 3 is a diagram showing the normal operation of the power supply system 10. The arrows in FIG. 3 indicate the power supply paths.

[0045] The first power generating device 14a is connected to the partial circuit 12a1 and the first connection circuit 18a by the interrupting device 22a. The first power generating device 14a is connected to the partial circuit 12c1 and the second connection circuit 18b by the interrupting device 22c. This allows power to be supplied from the first power generating device 14a to the first load device 16a and the third load device 16c. The second power generating device 14b is connected to the partial circuit 12b1 and the first connection circuit 18a by the interrupting device 22b, and the second power generating device 14b is connected to the partial circuit 12d1 and the second connection circuit 18b by the interrupting device 22d. This allows power to be supplied from the second power generating device 14b to the second load device 16b and the fourth load device 16d.

[0046] The first power storage device 24a is connected to the first load device 16a by the interrupting device 26a, and power is supplied from the first power storage device 24a to the first load device 16a. The second power storage device 24b is connected to the second load device 16b by the interrupting device 26b, and power is supplied from the second power storage device 24b to the second load device 16b. The third power storage device 24c is connected to the third load device 16c by the interrupting device 26c, and power is supplied from the third power storage device 24c to the third load device 16c. The fourth power storage device 24d is connected to the fourth load device 16d, and power is supplied from the fourth power storage device 24d to the fourth load device 16d.

[0047] The first connection device 20a1 and the second connection device 20a2 cut off the connection between the partial circuit 12a1 of the first power supply circuit 12a and the partial circuit 12b1 of the second power supply circuit 12b. The third connection device 20b1 and the fourth connection device 20b2 cut off the connection between the partial circuit 12c1 of the third power supply circuit 12c and the partial circuit 12d1 of the fourth power supply circuit 12d.

[0048] [Power supply system operation when the first abnormality occurs] Fig. 4 is a diagram showing the operation of the power supply system 10 when a first abnormality occurs. The bold arrows in Fig. 4 indicate the power supply paths. Fig. 4 shows the operation of the power supply system 10 when the supply of power from the first power generator 14a to the first power supply circuit 12a and the third power supply circuit 12c is cut off.

[0049] If an abnormality occurs in the area 44 in which the relay device 28 is located, there is a possibility that the relay device 28 will malfunction. If the relay device 28 malfunctions, the supply of power from the first power generation device 14a to the first load device 16a and the third load device 16c will be cut off. In this case, the first power storage device 24a supplies power to the first load device 16a, and the third power storage device 24c supplies power to the third load device 16c. However, there are cases in which the first power storage device 24a and the third power storage device 24c alone are not enough to operate the first load device 16a and the third load device 16c for a long period of time.

[0050] In this embodiment, the area 44 is separated by a partition wall 60 shown in FIG. 2. Therefore, an abnormality occurring in the area 44 does not affect the components outside the area 44. Therefore, the components outside the area 44 can operate normally. This makes it possible to ensure a power supply path from the remaining power source within the power supply system 10. Therefore, the operation of the power supply system 10 can be continued. According to this embodiment, it is possible to provide a power supply system 10 with greater redundancy.

[0051] When the abnormality shown in FIG. 4 occurs, the partial circuit 12a1 of the first power supply circuit 12a and the partial circuit 12b1 of the second power supply circuit 12b are connected by the first connection device 20a1 and the second connection device 20a2. This allows power to be supplied from the second power generation device 14b to the first load device 16a. Furthermore, the partial circuit 12c1 of the third power supply circuit 12c and the partial circuit 12d1 of the fourth power supply circuit 12d are connected by the third connection device 20b1 and the fourth connection device 20b2. This allows power to be supplied from the second power generation device 14b to the third load device 16c. This enables operation of the first load device 16a and the third load device 16c.

[0052] [Power supply system operation when the second abnormality occurs] Fig. 5 is a diagram showing the operation of the power supply system 10 when a second abnormality occurs. The bold arrows in Fig. 5 indicate the power supply paths. Fig. 5 shows the operation of the power supply system 10 when the supply of power from the first power generation device 14a and the first power storage device 24a to the first load device 16a is cut off.

[0053] If an abnormality occurs in the area 46 in which the relay device 30 is located, there is a possibility that the relay device 30 will break down. If the relay device 30 breaks down, the supply of power from the first power generation device 14a and the first power storage device 24a to the first load device 16a will be cut off. In this case, the power generated by the first power generation device 14a will be used only by the third load device 16c. Then, of the power generated by the first power generation device 14a, the amount of power used by the first load device 16a will be surplus.

[0054] In this embodiment, the area 46 is separated by a partition wall 60 shown in Fig. 2. Therefore, an abnormality occurring in the area 46 does not affect the components outside the area 46. Therefore, the components outside the area 46 can operate normally.

[0055] In the case of the abnormality shown in Figure 5, the partial circuit 12c1 of the third power supply circuit 12c and the partial circuit 12d1 of the fourth power supply circuit 12d are connected by the third connection device 20b1 and the fourth connection device 20b2. This allows power to be supplied from the first power generation device 14a to the fourth load device 16d. Therefore, the power generated by the first power generation device 14a is used not only by the third load device 16c but also by the fourth load device 16d. Therefore, the surplus power generated by the first power generation device 14a can be effectively utilized.

[0056] [Effects obtained by arranging each connection device] The effects obtained by the arrangement of each connection device (first connection device 20a1, second connection device 20a2, third connection device 20b1, fourth connection device 20b2) will be described using a comparative example.

[0057] Fig. 6 is a schematic diagram of a power supply system 100 of a comparative example. The power supply system 100 shown in Fig. 6 differs from the power supply system 10 of the present embodiment (Fig. 1, etc.) in the arrangement of the connection devices (first connection device 20a1, second connection device 20a2, third connection device 20b1, fourth connection device 20b2). In the power supply system 100, the first connection device 20a1 and the second connection device 20a2 are adjacent to each other in the same area. Similarly, in the power supply system 100, the third connection device 20b1 and the fourth connection device 20b2 are adjacent to each other in the same area.

[0058] The positive and negative wirings 19a1 and 19a2 of the first connection circuit 18a are bundled together. Typically, the positive and negative wirings 19a1 and 19a2 are each covered with an insulator. However, if the insulator peels off, the conductors are exposed. If the conductors of the positive and negative wirings 19a1 and 19a2 come into contact with each other, a short circuit occurs, regardless of whether the first connection device 20a1 and the second connection device 20a2 are connected. This prevents power from being supplied to the load device in the power supply circuit where the short circuit occurred. Similarly, if the conductors of the positive and negative wirings 19b1 and 19b2 come into contact with each other in the second connection circuit 18b, a short circuit occurs.

[0059] FIG. 7 is a diagram illustrating the effect of the arrangement of the connection devices according to this embodiment. The first connection device 20a1 is arranged in area 46 together with the relay device 30 of the first power supply circuit 12a. The second connection device 20a2 is arranged in area 52 together with the relay device 38 of the second power supply circuit 12b. When the first connection device 20a1 is in an interrupted state, the portion of the positive wiring 19a1 of the first connection circuit 18a arranged between area 46 and area 52 is connected to the positive electrode of the second power supply circuit 12b but is not connected to the positive electrode of the first power supply circuit 12a. When the second connection device 20a2 is in an interrupted state, the portion of the negative wiring 19a1 of the first connection circuit 18a arranged between area 46 and area 52 is connected to the negative electrode of the first power supply circuit 12a but is not connected to the negative electrode of the second power supply circuit 12b. In other words, when the first connection device 20a1 and the second connection device 20a2 mutually disconnect the first power supply circuit 12a and the second power supply circuit 12b, the positive electrode wiring 19a1 and the negative electrode wiring 19a2 are connected to separate circuits. Therefore, as long as the first connection device 20a1 and the second connection device 20a2 are in the disconnected state, no short circuit occurs between the area 46 and the area 52 even if the conductor portion of the positive electrode wiring 19a1 comes into contact with the conductor portion of the negative electrode wiring 19a2.

[0060] As described above, according to this embodiment, the first connection device 20a1 is disposed on the first end side (area 46) of the first connection circuit 18a, and the second connection device 20a2 is disposed on the second end side (area 52) of the first connection circuit 18a. This reduces the risk of a short circuit occurring in the first connection circuit 18a. As a result, it is possible to prevent power from being supplied to the load device due to a short circuit in the first connection circuit 18a. This makes it possible to provide a power supply system 10 with greater redundancy.

[0061] Similarly, according to this embodiment, the third connection device 20b1 is disposed on the first end side (area 48) of the second connection circuit 18b, and the fourth connection device 20b2 is disposed on the second end side (area 54) of the second connection circuit 18b. This reduces the risk of a short circuit occurring in the second connection circuit 18b. As a result, it is possible to prevent power from being supplied to the load device due to a short circuit in the second connection circuit 18b. This makes it possible to provide a power supply system 10 with greater redundancy.

[0062] [Variations] 8 is a schematic diagram of a first modified example of the power supply system 10. As shown in FIG. 8, the first power generation device 14a may be arranged in an area 44. The second power generation device 14b may be arranged in an area 50. At least one of the first power storage device 24a and the first load device 16a may be arranged in an area 46. At least one of the second power storage device 24b and the second load device 16b may be arranged in an area 52. At least one of the third power storage device 24c and the third load device 16c may be arranged in an area 48. At least one of the fourth power storage device 24d and the fourth load device 16d may be arranged in an area 54.

[0063] In this way, at least one of the first power generation device 14a, the second power generation device 14b, the first load device 16a, the second load device 16b, the third load device 16c, the fourth load device 16d, the first storage device 24a, the second storage device 24b, the third storage device 24c, and the fourth storage device 24d may be arranged within the area together with a relay device.

[0064] Fig. 9 is a schematic diagram of a second modified example of the power supply system 10. As shown in Fig. 9, the areas 44, 46, 48, 50, 52, and 54 may be spaced apart by a predetermined distance or more. In this case, a gap 62 of a predetermined distance or more is provided between two adjacent areas. The predetermined distance is set in advance so that an abnormality occurring in one of the two adjacent areas does not affect the other.

[0065] In this embodiment, two load devices and two power storage devices are connected to one power generation device. However, the present invention is not limited to this. For example, one load device and one power storage device may be connected to one power generation device. Furthermore, three or more load devices and three or more power storage devices may be connected to one power generation device. Furthermore, the power supply system 10 may include three or more combinations of one power generation device, one or more load devices, and one or more power storage devices.

[0066] Second Embodiment 10 is a schematic diagram of a mobile object 64. The power supply system 10 is mounted on the mobile object 64.

[0067] The moving body 64 of this embodiment is an electric vertical take-off and landing aircraft (eVTOL aircraft). The moving body 64 includes eight VTOL rotors 66. The VTOL rotors 66 generate thrust in the upward direction relative to the airframe 68. The moving body 64 includes eight electric motors 70. Each electric motor 70 drives one VTOL rotor 66. The moving body 64 includes two cruise rotors 72. The cruise rotors 72 generate thrust in the forward direction relative to the airframe 68. The moving body 64 includes four electric motors 74. Each electric motor 74 drives one cruise rotor 72.

[0068] Each of the first load device 16a, the second load device 16b, the third load device 16c, and the fourth load device 16d may include two electric motors 70 and one electric motor 74. Each of the first load device 16a, the second load device 16b, the third load device 16c, and the fourth load device 16d may include a low-voltage drive device in addition to the electric motors 70 and 74.

[0069] The mobile object 64 is not limited to an aircraft, but may be a ship, an automobile, a train, or the like.

[0070] According to the second embodiment, a mobile unit 64 with redundancy can be provided.

[0071] [Note] The following additional notes are further disclosed regarding the above embodiment.

[0072] (Appendix 1) The power supply system (10) of the present disclosure includes a first power supply circuit (12a) that supplies DC power output from a first power generation device (14a) to a first load device (16a), a second power supply circuit (12b) that supplies DC power output from a second power generation device (14b) to a second load device (16b), and a first connection circuit (18a) that includes a first connection device (20a1) that can connect the positive electrode of the first power supply circuit to the positive electrode of the second power supply circuit, and a second connection device (20a2) that can connect the negative electrode of the first power supply circuit to the negative electrode of the second power supply circuit, wherein the first connection device is arranged on one end side of the first connection circuit and the second connection device is arranged on the other end side of the first connection circuit.

[0073] According to the above configuration, the first connection device is disposed on one end of the first connection circuit, and the second connection device is disposed on the other end of the first connection circuit. This reduces the risk of a short circuit occurring in the first connection circuit. As a result, it is possible to prevent power from being supplied to the load device from being cut off due to a short circuit in the first connection circuit. This makes it possible to provide a power supply system with greater redundancy.

[0074] (Appendix 2) The power supply system described in Supplementary Note 1 may further include a third power supply circuit (12c) that supplies DC power output from the first power generation device to a third load device (16c), wherein the area in which the third power supply circuit is arranged is located between an area in which the first power supply circuit is arranged and an area in which the second power supply circuit is arranged, the first connection device is arranged between the area in which the first power supply circuit is arranged and the area in which the third power supply circuit is arranged, and the second connection device is arranged between the area in which the second power supply circuit is arranged and the area in which the third power supply circuit is arranged.

[0075] (Appendix 3) In the power supply system described in Appendix 1, the first power supply circuit and the first connection device may be arranged in a first area (46), and the second power supply circuit and the second connection device may be arranged in a second area (52) separate from the first area.

[0076] With the above configuration, an abnormality occurring in the first area does not affect components outside the first area. Similarly, an abnormality occurring in the second area does not affect components outside the second area. Therefore, components outside the area where the abnormality occurred can operate normally. This makes it possible, for example, to ensure a power supply path from a remaining power source within the power supply system. In other words, with the above configuration, it is possible to provide a power supply system with greater redundancy.

[0077] (Appendix 4) In the power supply system described in Appendix 1, the first power supply circuit and the first connection device may be arranged in a first area, the second power supply circuit and the second connection device may be arranged in a second area, and the first area and the second area may be separated by a partition wall (60).

[0078] According to the above configuration, the first area and the second area can be reliably separated.

[0079] (Appendix 5) The power supply system described in Supplementary Note 1 may include a third power supply circuit (12c) that supplies DC power output from the first power generation device to a third load device (16c), a fourth power supply circuit (12d) that supplies DC power output from the second power generation device to a fourth load device (16d), and a second connection circuit (18b) that includes a third connection device (20b1) that can connect a positive electrode of the third power supply circuit to a positive electrode of the fourth power supply circuit, and a fourth connection device (20b2) that can connect a negative electrode of the third power supply circuit to a negative electrode of the fourth power supply circuit, wherein the third connection device is arranged on one end side of the second connection circuit and the fourth connection device is arranged on the other end side of the second connection circuit, the third power supply circuit is arranged between the first power supply circuit and the second power supply circuit, and the second power supply circuit is arranged between the third power supply circuit and the fourth power supply circuit.

[0080] (Appendix 6) In the power supply system described in Supplementary Note 1, there is provided a first relay device (30) including a first power storage device (24a) connected in parallel with the first power generation device to the first power supply circuit, a second power storage device (24b) connected in parallel with the second power generation device to the second power supply circuit, a first partial circuit (12a1) that is a part of the first power supply circuit and equipped with a first breaker device (26a) that can disconnect the first power storage device from the first partial circuit, a second relay device (28) including a second partial circuit (12a2) that is another part of the first power supply circuit and equipped with a second breaker device (22a) that can disconnect the first power generation device from the first partial circuit, and The power supply system may include a third relay device (38) that includes a third partial circuit (12b1) that is a part of a second power supply circuit and that has a third breaker device (26b) that can disconnect the second power storage device from the third partial circuit, and a fourth relay device (36) that includes a fourth partial circuit (12b2) that is another part of the second power supply circuit and that has a fourth breaker device (22b) that can disconnect the second power generation device from the third partial circuit, wherein the first connection device may be capable of connecting a positive electrode wiring of the first partial circuit to a positive electrode wiring of the third partial circuit, and the second connection device may be capable of connecting a negative electrode wiring of the first partial circuit to a negative electrode wiring of the third partial circuit.

[0081] (Appendix 7) A moving object (64) of the present disclosure includes the power supply system described in any one of Supplementary Notes 1 to 6.

[0082] According to the above configuration, it is possible to provide a mobile body with redundancy.

[0083] Although the present disclosure has been described in detail, the present disclosure is not limited to the individual embodiments described above. Various additions, substitutions, modifications, partial deletions, etc. are possible in these embodiments without departing from the gist of the present disclosure or the spirit of the present disclosure derived from the content of the claims and their equivalents. These embodiments can also be implemented in combination. For example, in the above-described embodiments, the order of each operation and the order of each process are shown as examples and are not limited to these. The same applies when numerical values ​​or mathematical expressions are used in the description of the above-described embodiments. [Explanation of symbols]

[0084] 10... Power supply system 12a... First power supply circuit 12a1...Partial circuit (first part circuit) 12a2…Partial circuit (second partial circuit) 12b…Second power supply circuit 12b1...Partial circuit (3rd partial circuit) 12b2…Partial circuit (4th partial circuit) 12c…3rd power supply circuit 12d...Fourth power supply circuit 14a...First power generating device 14b... Second power generating device 16a... First load device 16b...Second load device 16c...Third load device 16d...Fourth load device 18a...First connection circuit 18b... Second connection circuit 20a1... First connection device 20a2...Second connection device 20b1...Third connection device 20b2...Fourth connection device 22a...Breaker (second breaker) 22b... Circuit breaker (fourth circuit breaker) 24a... First power storage device 24b... Second power storage device 26a... Circuit breaker (first circuit breaker) 26b... Circuit breaker (third circuit breaker) 28... Relay device (second relay device) 30...Relay device (first relay device) 36...Relay device (fourth relay device) 38...Relay device (third relay device) 46...Area (first area) 52...Area (Second Area) 60...Bulkhead 64...Mobile

Claims

1. a first power supply circuit that supplies DC power output from the first power generation device to a first load device; a second power supply circuit that supplies DC power output from the second power generation device to a second load device; a first connection circuit including a first connection device that can connect the positive electrode of the first power supply circuit to the positive electrode of the second power supply circuit, and a second connection device that can connect the negative electrode of the first power supply circuit to the negative electrode of the second power supply circuit; Equipped with the first connection device is disposed on one end side of the first connection circuit, The second connection device is disposed on the other end side of the first connection circuit.

2. 2. The power supply system according to claim 1, a third power supply circuit that supplies DC power output from the first power generation device to a third load device; an area in which the third power supply circuit is arranged is located between an area in which the first power supply circuit is arranged and an area in which the second power supply circuit is arranged; A power supply system, wherein the first connection device is arranged between the area in which the first power supply circuit is arranged and the area in which the third power supply circuit is arranged, and the second connection device is arranged between the area in which the second power supply circuit is arranged and the area in which the third power supply circuit is arranged.

3. 2. The power supply system according to claim 1, the first power supply circuit and the first connection device are arranged in a first area; The second power supply circuit and the second connection device are arranged in a second area separate from the first area.

4. 2. The power supply system according to claim 1, the first power supply circuit and the first connection device are disposed in a first area; the second power supply circuit and the second connection device are disposed in a second area; The power supply system, wherein the first area and the second area are separated by a partition wall.

5. 2. The power supply system according to claim 1, a third power supply circuit that supplies DC power output from the first power generation device to a third load device; a fourth power supply circuit that supplies DC power output from the second power generation device to a fourth load device; a second connection circuit including a third connection device that can connect the positive electrode of the third power supply circuit to the positive electrode of the fourth power supply circuit, and a fourth connection device that can connect the negative electrode of the third power supply circuit to the negative electrode of the fourth power supply circuit; Equipped with the third connection device is disposed on one end side of the second connection circuit, the fourth connection device is disposed on the other end side of the second connection circuit, the third power supply circuit is disposed between the first power supply circuit and the second power supply circuit; The power supply system, wherein the second power supply circuit is disposed between the third power supply circuit and the fourth power supply circuit.

6. 2. The power supply system according to claim 1, a first power storage device connected in parallel with the first power generation device to the first power supply circuit; a second power storage device connected in parallel to the second power generation device to the second power supply circuit; a first relay device including a first partial circuit that is a part of the first power supply circuit and including a first interruption device that can interrupt the first power storage device from the first partial circuit; a second relay device including a second partial circuit that is another part of the first power supply circuit and including a second interrupter that can interrupt the first power generation device from the first partial circuit; a third relay device including a third partial circuit that is a part of the second power supply circuit and including a third cutoff device that can cut off the second power storage device from the third partial circuit; a fourth relay device including a fourth partial circuit that is another part of the second power supply circuit and including a fourth interrupter that can interrupt the second power generation device from the third partial circuit; Equipped with the first connection device is capable of connecting a positive wiring of the first partial circuit and a positive wiring of the third partial circuit, The second connection device is capable of connecting a negative wiring of the first partial circuit and a negative wiring of the third partial circuit.

7. A mobile object comprising the power supply system according to any one of claims 1 to 6.

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