Power supply system and moving body

Abstract

To provide a sufficient power supply system and a moving body.SOLUTION: A power supply system 10 includes: a power storage device 16a; a power supply circuit 18a for supplying DC power to a load device 14a from the power storage device; and a containment 50a for storing the power storage device. The power supply circuit includes: positive electrode wiring 34a and negative electrode wiring 36a; a first switch 38a provided in positive electrode wiring; and a second switch 40a provided in negative electrode wiring. One of the first switch and the second switch is provided inside the containment, and the other of the first switch and the second switch is provided outside the containment.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a power supply system and a mobile object. [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. The power supply system includes a power supply circuit that supplies DC power from a power storage device to a load device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 6-003975 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a need for better power supply systems and vehicles.

[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 power storage device; a power supply circuit that supplies DC power from the power storage device to a load device; and a containment that houses the power storage device, wherein the power supply circuit has positive wiring and negative wiring, a first switch provided on the positive wiring, and a second switch provided on the negative wiring, one of the first switch and the second switch being disposed inside the containment, and the other of the first switch and the second switch being disposed outside the containment.

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

[0009] According to the present disclosure, a better power supply system and a mobile object can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram of a power supply system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a control block diagram of the control device. [Figure 3] FIG. 3 is a flowchart illustrating the operation of the power supply system. [Figure 4] FIG. 4 is a diagram illustrating the operation of the power supply system. [Figure 5] FIG. 5 is a diagram illustrating the operation of the power supply system. [Figure 6] FIG. 6 is a diagram illustrating the operation of the power supply system. [Figure 7] FIG. 7 is a diagram illustrating the operation of a power supply system according to a comparative example. [Figure 8] FIG. 8 is a diagram illustrating the operation of a power supply system according to a comparative example. [Figure 9] FIG. 9 is a schematic diagram of a power supply system according to a modified example. [Figure 10] FIG. 10 is a schematic diagram of a moving object. DETAILED DESCRIPTION OF THE INVENTION

[0011] In the power supply system, the power supply circuit includes positive and negative wiring, a first switch provided on the positive wiring, and a second switch provided on the negative wiring. The power supply system may also include a containment that houses a power storage device. For example, if a fire breaks out in the power storage device, the containment prevents the fire from spreading outside the containment. If the first switch and the second switch are disposed inside such a containment, for example, the power storage device, the first switch, and the second switch may be lost in their entirety if a fire breaks out inside the containment. Furthermore, the size of the power supply system tends to be relatively large. The present disclosure has been made in consideration of these problems and can provide a power supply system and a mobile object that can reduce the number of components lost when an abnormality such as a fire occurs inside the containment and enable the size of the power supply system to be relatively small.

[0012] A power supply system 10 and a mobile object 200 according to an embodiment of the present disclosure will be described below with reference to the drawings. Fig. 1 is a schematic diagram of the power supply system 10. As shown in Fig. 1, the power supply system 10 includes a power generation device 12, a first load device 14a, a first power storage device 16a, a first power supply circuit 18a, a second load device 14b, a second power storage device 16b, and a second power supply circuit 18b.

[0013] The power generation device 12 has, for example, an engine, a generator, and a power control unit. Note that these components of the power generation device 12 are not shown. The engine drives the generator. The generator generates three-phase AC power. The power control unit converts the three-phase AC power into DC power. The power generation device 12 has a smoothing capacitor 20 on the output side of the DC power. The smoothing capacitor 20 is charged (pre-charged) when the power supply system 10 is started up. The power generation device 12 may have multiple smoothing capacitors 20.

[0014] The power generation device 12 may be provided with components other than those described above (for example, various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but the description thereof will be omitted here.

[0015] The first load device 14a includes, for example, an inverter and an electric motor. Note that these components of the first load device 14a are not shown. The inverter converts input DC power into three-phase AC power. The electric motor is driven by the three-phase AC power.

[0016] The first load device 14a may further include, for example, a DC / DC converter and a low-voltage drive device. The DC / DC converter reduces the voltage of the DC power input to the DC / DC converter. The low-voltage drive device is driven by the DC power output from the DC / DC converter. The first load device 14a includes a smoothing capacitor 22a on the input side of the DC power. The smoothing capacitor 22a is charged (pre-charged) when the power supply system 10 is started up. The first load device 14a may include multiple smoothing capacitors 22a.

[0017] The first load device 14a may be provided with components other than those described above (for example, various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but the description thereof will be omitted here.

[0018] The first power storage device 16a includes, for example, a lithium ion battery. The first power storage device 16a may include a secondary battery other than a lithium ion battery. The first power storage device 16a may include a large-capacity capacitor.

[0019] The first power storage device 16a may include a fuse (not shown) for interrupting a short-circuit current when the short-circuit current flows between a first positive wiring 34a and a first negative wiring 36a (described later). Instead of a fuse, the first power storage device 16a may include an element (such as a pyro switch) having a sufficient interrupting current capacity. The first power storage device 16a may include components other than those described above (such as various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but these will not be described here.

[0020] The first power supply circuit 18a supplies DC power from the power generation device 12 to the first load device 14a. The first power supply circuit 18a supplies DC power from the first power storage device 16a to the first load device 14a.

[0021] The first power supply circuit 18a has a first positive power line 28a, a first negative power line 30a, and a circuit breaker 32a. The first positive power line 28a electrically connects the positive terminal of the power generation device 12 to the positive terminal of the first load device 14a. The first negative power line 30a electrically connects the negative terminal of the power generation device 12 to the negative terminal of the first load device 14a. The circuit breaker 32a has a pair of switches (not shown). One switch of the circuit breaker 32a is provided on the first positive power line 28a. The other switch of the circuit breaker 32a is provided on the first negative power line 30a. The circuit breaker 32a may be provided with components other than those described above (for example, various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but description thereof will be omitted here.

[0022] The first power supply circuit 18a further includes a first positive wiring 34a, a first negative wiring 36a, a first switch 38a, a second switch 40a, and a precharge circuit 42a. The first positive wiring 34a electrically connects the positive terminal of the first power storage device 16a to the first positive power line 28a. The first negative wiring 36a electrically connects the negative terminal of the first power storage device 16a to the first negative power line 30a.

[0023] The first switch 38a is provided on the first positive wiring 34a. The second switch 40a is provided on the first negative wiring 36a. The precharge circuit 42a precharges the smoothing capacitor 22a provided in the first load device 14a. The precharge circuit 42a is connected to the first positive wiring 34a.

[0024] The precharge circuit 42a includes a bypass line 44a, a precharge switch 46a, and a precharge resistor 48a. The bypass line 44a is electrically connected to the first positive wiring 34a so as to bypass the first switch 38a.

[0025] One end of the detour line 44a is electrically connected to a first partial wiring 35a of the first positive wiring 34a. The first partial wiring 35a electrically connects the positive terminal of the first power storage device 16a and one terminal of the first switch 38a. The other end of the detour line 44a is electrically connected to a second partial wiring 37a of the first positive wiring 34a. The second partial wiring 37a electrically connects the other terminal of the first switch 38a and the first positive power line 28a.

[0026] The precharge switch 46a and the precharge resistor 48a are provided in series on the bypass line 44a. One terminal of the precharge switch 46a is electrically connected to the first partial wiring 35a. The other terminal of the precharge switch 46a is electrically connected to the second partial wiring 37a via the precharge resistor 48a. The precharge circuit 42a may include components other than those described above (e.g., various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but description thereof will be omitted here.

[0027] The second load device 14b has the same configuration as the first load device 14a. Therefore, a detailed description of the configuration of the second load device 14b will be omitted. The second load device 14b has a smoothing capacitor 22b on the input side of the DC power. The second load device 14b may have multiple smoothing capacitors 22b.

[0028] The second power storage device 16b has a configuration similar to that of the first power storage device 16a. Therefore, a detailed description of the configuration of the second power storage device 16b will be omitted. Note that the second power storage device 16b may be provided with a fuse (not shown) for interrupting a short-circuit current when the short-circuit current flows between a second positive electrode wiring 34b and a second negative electrode wiring 36b (described later). The second power storage device 16b may be provided with an element (for example, a pyro switch) having a sufficient interrupting current capacity instead of a fuse.

[0029] The second power supply circuit 18b supplies DC power from the power generation device 12 to the second load device 14b. The second power supply circuit 18b supplies DC power from the second power storage device 16b to the second load device 14b.

[0030] The second power supply circuit 18b has a second positive power line 28b, a second negative power line 30b, and a circuit breaker 32b. One end of the second positive power line 28b is electrically connected to a positive partial power line 29a of the first positive power line 28a. The positive partial power line 29a electrically connects the positive terminal of the power generation device 12 to the circuit breaker 32a. The other end of the second positive power line 28b is electrically connected to a positive terminal of the second load device 14b. One end of the second negative power line 30b is electrically connected to a negative partial power line 31a. The negative partial power line 31a electrically connects the negative terminal of the power generation device 12 to the circuit breaker 32a. The other end of the second negative power line 30b is electrically connected to the negative terminal of the second load device 14b.

[0031] The circuit breaker 32b has a pair of switches (not shown). One switch of the circuit breaker 32b is provided on the second positive power line 28b. The other switch of the circuit breaker 32b is provided on the second negative power line 30b. The circuit breaker 32b may be provided with components other than those described above (for example, various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but description thereof will be omitted here.

[0032] The second power supply circuit 18b further includes a second positive wiring 34b, a second negative wiring 36b, a first switch 38b, a second switch 40b, and a precharge circuit 42b. The second positive wiring 34b electrically connects the positive terminal of the second power storage device 16b to the second positive power line 28b. The second negative wiring 36b electrically connects the negative terminal of the second power storage device 16b to the second negative power line 30b.

[0033] The first switch 38b is provided on the second positive wiring 34b. The second switch 40b is provided on the second negative wiring 36b. The precharge circuit 42b precharges the smoothing capacitor 22b provided in the second load device 14b. The precharge circuit 42b is connected to the second positive wiring 34b.

[0034] The precharge circuit 42b includes a bypass line 44b, a precharge switch 46b, and a precharge resistor 48b. The bypass line 44b is electrically connected to the second positive wiring 34b so as to bypass the first switch 38b.

[0035] One end of the detour line 44b is electrically connected to a first partial wiring 35b of the second positive wiring 34b. The first partial wiring 35b electrically connects the positive terminal of the second power storage device 16b and one terminal of the first switch 38b. The other end of the detour line 44b is electrically connected to a second partial wiring 37b of the second positive wiring 34b. The second partial wiring 37b electrically connects the other terminal of the first switch 38b and the second positive power line 28b.

[0036] The precharge switch 46b and the precharge resistor 48b are provided in series on the bypass line 44b. One terminal of the precharge switch 46b is electrically connected to the first partial wiring 35b. The other terminal of the precharge switch 46b is electrically connected to the second partial wiring 37b via the precharge resistor 48b. The precharge circuit 42b may include components other than those described above (e.g., various sensors, fuses, relays, breakers, diodes, transistors, resistors, coils, capacitors, etc.), but description thereof will be omitted here.

[0037] The power supply system 10 further includes a first containment 50a, a temperature sensor 52a, a second containment 50b, and a temperature sensor 52b. The first containment 50a is a protective case that houses the first power storage device 16a. The first containment 50a entirely covers the first power storage device 16a. The material that constitutes the first containment 50a has heat resistance, fire resistance, and thermal insulation properties. In other words, if a fire breaks out inside the first containment 50a, the first containment 50a prevents the fire from spreading outside the first containment 50a. The second switch 40a is disposed inside the first containment 50a. The first switch 38a and the precharge circuit 42a are disposed outside the first containment 50a.

[0038] The temperature sensor 52a may sequentially measure the temperature inside the first containment 50a. Specifically, the temperature sensor 52a may sequentially measure the temperature of the first power storage device 16a. The temperature sensor 52a may be disposed inside the first containment 50a.

[0039] The second containment 50b is a protective case that houses the second power storage device 16b. The second containment 50b entirely covers the second power storage device 16b. The material that constitutes the second containment 50b has heat resistance, fire resistance, and heat insulation properties. In other words, if a fire breaks out inside the second containment 50b, the second containment 50b prevents the fire from spreading outside the second containment 50b. The second switch 40b is disposed inside the second containment 50b. The first switch 38b and the precharge circuit 42b are disposed outside the second containment 50b.

[0040] The temperature sensor 52b may sequentially measure the temperature inside the second containment 50b. Specifically, the temperature sensor 52b may sequentially measure the temperature of the second power storage device 16b. The temperature sensor 52b may be disposed inside the second containment 50b.

[0041] FIG. 2 is a control block diagram of the control device 60. As shown in FIG. 2, the power supply system 10 further includes a control device (ECU) 60. The control device 60 is preferably disposed outside the first containment 50a and the second containment 50b. In this case, even if a fire breaks out inside the first containment 50a or the second containment 50b, the fire can be prevented from spreading to the control device 60. Power for operating switches such as the control device 60 and the circuit breakers 32a and 32b is supplied by a low-voltage power storage device (not shown) different from the first power storage device 16a and the second power storage device 16b. The power storage device is disposed outside the first containment 50a and the second containment 50b. This prevents the power supply to the control device 60 from being stopped even if a fire breaks out inside the first containment 50a or the second containment 50b. The temperature sensor 52a sequentially supplies information indicating the temperature inside the first containment 50a to the control device 60. The temperature sensor 52b sequentially supplies information indicating the temperature inside the second containment 50b to the control device 60.

[0042] The control device 60 includes a calculation unit 62 and a storage unit 64. The calculation unit 62 is configured by a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). That is, the calculation unit 62 is configured by processing circuitry.

[0043] The calculation unit 62 has a control unit 66 and an abnormality detection unit 68. The control unit 66 is responsible for overall control of the power supply system 10. The control unit 66 controls the operation of the circuit breakers 32a and 32b, the first switches 38a and 38b, the second switches 40a and 40b, and the pre-charge switches 46a and 46b. The circuit breakers 32a and 32b are in a conductive state when receiving a signal from the control device 60, and are in a cut-off state when not receiving a signal from the control device 60. The first switches 38a and 38b, the second switches 40a and 40b, and the pre-charge switches 46a and 46b are in an on state when receiving a signal from the control device 60, and are in an off state when not receiving a signal from the control device 60.

[0044] The abnormality detection unit 68 detects an abnormality inside the first containment 50a based on information supplied from the temperature sensor 52a. The abnormality detection unit 68 detects an abnormality inside the second containment 50b based on information supplied from the temperature sensor 52b.

[0045] The control unit 66 and the abnormality detection unit 68 can be realized by the calculation unit 62 executing a program stored in the storage unit 64. At least a part of the control unit 66 and the abnormality detection unit 68 may be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). Also, at least a part of the control unit 66 and the abnormality detection unit 68 may be configured by an electronic circuit including discrete devices.

[0046] The storage unit 64 is composed of a volatile memory (not shown) and a non-volatile memory (not shown). Examples of the volatile memory include RAM (Random Access Memory). The volatile memory is used as a working memory for the processor and temporarily stores data necessary for processing or calculation. Examples of the non-volatile memory include ROM (Read Only Memory) and flash memory. The non-volatile memory is used as a storage memory and stores programs, tables, maps, etc. At least a part of the storage unit 64 may be provided in the processor, integrated circuit, etc. described above.

[0047] Next, the operation of the power supply system 10 will be described. Fig. 3 is a flowchart for explaining the operation of the power supply system 10. Figs. 4 to 6 are explanatory diagrams of the operation of the power supply system 10. For example, when a user manually turns on a power switch or the like (not shown), the control unit 66 starts up the power supply system 10.

[0048] Then, in step S1 of Fig. 3, the control unit 66 performs a system startup preparation process. Specifically, as shown in Fig. 4, the control unit 66 places each of the circuit breakers 32a and 32b in a conductive state. That is, the control unit 66 turns on a pair of switches in each of the circuit breakers 32a and 32b. The control unit 66 also turns off the first switches 38a and 38b and turns on the second switches 40a and 40b and the pre-charge switches 46a and 46b.

[0049] As a result, an RC circuit is formed that includes the first power storage device 16a, the pre-charge switch 46a, the pre-charge resistor 48a, the interrupter 32a, the smoothing capacitor 20 of the power generation device 12, and the second switch 40a. Also, an RC circuit is formed that includes the first power storage device 16a, the pre-charge switch 46a, the pre-charge resistor 48a, the smoothing capacitor 22a of the first load device 14a, and the second switch 40a.

[0050] Furthermore, an RC circuit is formed including the second power storage device 16b, the pre-charge switch 46b, the pre-charge resistor 48b, the interrupter 32b, the smoothing capacitor 20 of the power generation device 12, and the second switch 40b. Also, an RC circuit is formed including the second power storage device 16b, the pre-charge switch 46b, the pre-charge resistor 48b, the smoothing capacitor 22b of the second load device 14b, and the second switch 40b.

[0051] As a result, current flows along the path indicated by the arrows in FIG. 4. The smoothing capacitor 20 of the power generation device 12 receives DC power from the first power storage device 16a via the pre-charge resistor 48a, and receives DC power from the second power storage device 16b via the pre-charge resistor 48b. Charge accumulates in the smoothing capacitor 20, causing it to be charged. The smoothing capacitor 22a of the first load device 14a receives DC power from the first power storage device 16a via the pre-charge resistor 48a. Charge accumulates in the smoothing capacitor 22a, causing it to be charged. The smoothing capacitor 22b of the second load device 14b receives DC power from the second power storage device 16b via the pre-charge resistor 48b. Charge accumulates in the smoothing capacitor 22b, causing it to be charged. When the smoothing capacitors 20, 22a, and 22b reach a predetermined voltage, the system startup preparation process is completed. After this, the process proceeds to step S2.

[0052] In step S2, the control unit 66 performs a system startup process. As shown in Fig. 5, the control unit 66 maintains the circuit breakers 32a and 32b in a conductive state. The control unit 66 also turns off the precharge switches 46a and 46b and turns on the first switches 38a and 38b. The control unit 66 also maintains the second switches 40a and 40b on.

[0053] In this case, at least one of the power generation device 12 and the first power storage device 16a can supply DC power to the first load device 14a. Also, at least one of the power generation device 12 and the second power storage device 16b can supply DC power to the second load device 14b. After this, the process proceeds to step S3.

[0054] In step S3, the abnormality detection unit 68 determines whether an abnormality has occurred inside at least one of the first containment 50a and the second containment 50b. Specifically, the abnormality detection unit 68 determines that an abnormality (e.g., a fire) has occurred inside the first containment 50a when the temperature supplied from the temperature sensor 52a exceeds a predetermined abnormal temperature. The abnormality detection unit 68 determines that an abnormality (e.g., a fire) has occurred inside the second containment 50b when the temperature supplied from the temperature sensor 52b exceeds a predetermined abnormal temperature.

[0055] If the abnormality detection unit 68 determines that an abnormality has occurred in at least one of the first containment 50a and the second containment 50b (YES in step S3), the process proceeds to step S4. If the abnormality detection unit 68 determines that an abnormality has not occurred in either the first containment 50a or the second containment 50b (NO in step S3), the process proceeds to step S5.

[0056] In step S4, the control unit 66 performs a disconnection process. Specifically, as shown in FIG. 6, if an abnormality occurs inside the first containment 50a, the control unit 66 turns off each of the first switch 38a and the second switch 40a. This electrically disconnects the first power storage device 16a from the first positive power line 28a and the first negative power line 30a. Therefore, even if, for example, the insulating coatings of the first positive wiring 34a and the first negative wiring 36a melt inside the first containment 50a, causing a short circuit between the first positive wiring 34a and the first negative wiring 36a, no current flows from the power generation device 12 and the second power storage device 16b to the short-circuited portion. Note that if the first positive wiring 34a and the first negative wiring 36a short-circuit inside the first containment 50a, for example, a fuse inside the first power storage device 16a melts, preventing a short-circuit current from flowing to the short-circuited portion.

[0057] In this case, DC power is supplied to the first load device 14a from the power generation device 12. Therefore, the supply of DC power to the first load device 14a is not interrupted. In other words, even if an abnormality occurs inside the first containment 50a, DC power can continue to be supplied to the first load device 14a and the second load device 14b. Although detailed illustrations and explanations are omitted, if an abnormality occurs inside the second containment 50b, the control unit 66 turns off each of the first switch 38b and the second switch 40b. This achieves the same effects as those described above. After this, the process proceeds to step S5.

[0058] In step S5, the control unit 66 determines whether or not an instruction to stop the system has been received. If the control unit 66 determines that an instruction to stop the system has not been received (NO in step S5), the process proceeds to step S3. If the control unit 66 determines that an instruction to stop the system has been received (YES in step S5), the process proceeds to step S6.

[0059] In step S6, the control unit 66 performs a system shutdown process. Specifically, the control unit 66 controls the operation of the circuit breakers 32a and 32b, the first switches 38a and 38b, the second switches 40a and 40b, and the pre-charge switches 46a and 46b to stop the supply of DC power to the first load device 14a and the second load device 14b. Then, the process shown in FIG. 3 is completed.

[0060] Next, a power supply system 100 according to a comparative example will be described. Figures 7 and 8 are explanatory diagrams of the power supply system 100 according to the comparative example. As shown in Figure 7, in the power supply system 100 according to the comparative example, a first switch 38a, a second switch 40a, and a precharge circuit 42a are arranged inside a first containment 102a, and a first switch 38b, a second switch 40b, and a precharge circuit 42b are arranged inside a second containment 102b. Other configurations of the power supply system 100 are the same as those of the power supply system 10 described above.

[0061] In the power supply system 100, for example, if a fire breaks out inside the first containment 102a, the first power storage device 16a, the first switch 38a, the second switch 40a, and the precharge circuit 42a, which are arranged inside the first containment 102a, may be lost entirely. In addition, since the size of the first containment 50a needs to be relatively large, the overall size of the power supply system 100 is likely to increase.

[0062] Furthermore, for example, a short circuit 104 shown in FIG. 7 may occur inside the first containment 102a. This short circuit 104 is formed by electrically connecting the first positive wiring 34a and the first negative wiring 36a inside the first containment 102a. In this case, even if the control unit 66 turns off the first switch 38a and the second switch 40a, a short circuit current flows from the power generation device 12 and the second power storage device 16b to the short circuit 104. This stops the supply of DC power to the first load device 14a and the second load device 14b.

[0063] In such a case, the control unit 66 can put the breaker device 32a into a cutoff state, as shown in Fig. 8. This causes the second load device 14b to be supplied with DC power from the power generation device 12 and the second power storage device 16b. However, because DC power is not supplied to the first load device 14a, the first load device 14a cannot be driven.

[0064] According to this embodiment, the first switch 38a and the precharge circuit 42a are disposed outside the first containment 50a, and the second switch 40a is disposed inside the first containment 50a. Therefore, even if a fire breaks out inside the first containment 50a, the loss of the first switch 38a and the precharge circuit 42a can be prevented. Furthermore, the first switch 38b and the precharge circuit 42b are disposed outside the second containment 50b, and the second switch 40b is disposed inside the second containment 50b. Therefore, even if a fire breaks out inside the second containment 50b, the loss of the first switch 38b and the precharge circuit 42b can be prevented. Furthermore, since the size of each of the first containment 50a and the second containment 50b can be relatively small, the overall size of the power supply system 10 can be made compact. This results in a better power supply system 10.

[0065] Furthermore, even if the first positive wiring 34a and the first negative wiring 36a are short-circuited inside the first containment 50a, by turning off the first switch 38a disposed outside the first containment 50a, it is possible to prevent short-circuit current from flowing from the power generation device 12 and the second power storage device 16b to the short-circuited part inside the first containment 50a, and therefore the supply of DC power to the first load device 14a is not interrupted.

[0066] Next, a power supply system 10a according to a modified example will be described. FIG. 9 is a schematic diagram of the power supply system 10a according to the modified example. As shown in FIG. 9, in the power supply system 10a, the first switch 38a and the precharge circuit 42a are arranged inside the first containment 50a, and the second switch 40a is arranged outside the first containment 50a. In addition, in the power supply system 10a, the first switch 38b and the precharge circuit 42b are arranged inside the second containment 50b, and the second switch 40b is arranged outside the second containment 50b. The power supply system 10a provides the same effects as the power supply system 10 described above.

[0067] The power supply system 10, 10a is not limited to the above-described configuration. The power supply system 10, 10a may include a first backflow prevention device that limits the supply of power from the first power storage device 16a to the power generation device 12, and a second backflow prevention device that limits the supply of power from the second power storage device 16b to the power generation device 12. These backflow prevention devices are located outside the first containment 50a and the second containment 50b, respectively. A detailed description of the configuration of the backflow prevention devices will be omitted.

[0068] The power supply system 10, 10a may include a sensor that detects heat, smoke, flames, etc. generated inside the first containment 50a and a sensor that detects heat, smoke, flames, etc. generated inside the second containment 50b. In this case, the abnormality detection unit 68 can determine whether a fire has occurred inside the first containment 50a or the second containment 50b based on information supplied from these sensors.

[0069] The abnormality detection unit 68 may detect, for example, a high temperature abnormality or a low temperature abnormality in the first power storage device 16a and the second power storage device 16b based on information supplied from the temperature sensors 52a and 52b. The power supply system 10 may include a camera capable of capturing images of the inside of the first containment 50a and the inside of the second containment 50b. In this case, the abnormality detection unit 68 may detect an abnormality in the inside of the first containment 50a and the inside of the second containment 50b based on information supplied from the camera. The power supply system 10 may also include a disconnection detector that detects a disconnection in the first positive wiring 34a, the second positive wiring 34b, the first negative wiring 36a, or the second negative wiring 36b inside the first containment 50a and the second containment 50b. In this case, the abnormality detection unit 68 can detect a wire break abnormality inside the first containment 50a and a wire break abnormality inside the second containment 50b based on information supplied from the wire break detector. The abnormality detection unit 68 may also detect a communication abnormality between the first power storage device 16a and the second power storage device 16b.

[0070] In the power supply system 10, 10a, the second load device 14b, the second power storage device 16b, the second power supply circuit 18b, the second containment 50b, and the temperature sensor 52b may be omitted. Furthermore, in the power supply system 10, 10a, the number of each of the power storage devices and the load devices is not limited to two, but may be three or more. Two or more power generation devices 12 may be provided.

[0071] FIG. 10 is a schematic diagram of a moving body 200. As shown in FIG. 10, the power supply system 10, 10a can be mounted on the moving body 200. The moving body 200 is, for example, an electric vertical take-off and landing aircraft (eVTOL aircraft). The moving body 200 includes eight VTOL rotors 202. The VTOL rotors 202 generate upward thrust for the airframe 204. The moving body 200 includes eight electric motors 206. Each electric motor 206 drives one VTOL rotor 202. The moving body 200 includes two cruise rotors 208. The cruise rotor 208 generates forward thrust for the airframe 204. The moving body 200 includes four electric motors 210. Each electric motor 210 drives one cruise rotor 208.

[0072] The precharge circuit 42a may be provided on the first negative electrode wiring 36a, and the precharge circuit 42b may be provided on the second negative electrode wiring 36b.

[0073] Each of the first load device 14a and the second load device 14b may include at least one of a plurality of electric motors 206 and a plurality of electric motors 210. In addition to the electric motors 206 and 210, each of the first load device 14a and the second load device 14b may include a low-voltage drive device.

[0074] The following additional notes are further disclosed regarding the above embodiment.

[0075] (Appendix 1) The power supply system (10, 10a) of the present disclosure includes a power storage device (16a, 16b), a power supply circuit (18a, 18b) that supplies DC power from the power storage device to a load device (14a, 14b), and a containment (50a, 50b) that houses the power storage device, and the power supply circuit has positive wiring (34a, 34b) and negative wiring (36a, 36b), a first switch (38a, 38b) provided in the positive wiring, and a second switch (40a, 40b) provided in the negative wiring, one of the first switch and the second switch being arranged inside the containment, and the other of the first switch and the second switch being arranged outside the containment.

[0076] According to this configuration, one of the first switch and the second switch is disposed inside the containment, and the other of the first switch and the second switch is disposed outside the containment. Therefore, even if an abnormality (e.g., a fire) occurs inside the containment, it is possible to prevent both the first switch and the second switch from being lost. Furthermore, since the size of the containment can be made relatively small, the overall size of the power supply system can be made compact. This allows for a better power supply system to be obtained.

[0077] (Appendix 2) In the power supply system described in Supplementary Note 1, the power supply circuit may include a precharge circuit (42a, 42b) for precharging a smoothing capacitor (22a, 22b) provided in the load device, and the precharge circuit may be arranged outside the containment.

[0078] This configuration can prevent the precharge circuit from being lost even if an abnormality (for example, a fire) occurs inside the containment, and also allows the size of the containment to be further reduced.

[0079] (Appendix 3) The power supply system according to Supplementary Note 1 or 2 may further include a power generation device (12) connected in parallel to the power storage device in the power supply circuit.

[0080] With this configuration, even if an abnormality (for example, a fire) occurs inside the containment, DC power can be supplied from the power generation device to the load device.

[0081] (Appendix 4) The power supply system according to any one of Supplementary Notes 1 to 3 may further include a control unit (66) that controls the operation of each of the first switch and the second switch, and the control unit may be disposed outside the containment.

[0082] With this configuration, even if an abnormality (for example, a fire) occurs inside the containment, the loss of the control unit can be prevented, and the first switch and the second switch can be operated.

[0083] (Appendix 5) In the power supply system described in Supplementary Note 4, the control unit may turn off the other of the first switch and the second switch when an abnormality is detected inside the containment.

[0084] With this configuration, even if the positive wiring and the negative wiring are short-circuited inside the containment, the other of the first switch and the second switch is turned off, thereby preventing short-circuit current from flowing from other power supply devices (power generation devices, power storage devices, etc.) to the short-circuited section.

[0085] (Appendix 6) A moving body (200) of the present disclosure includes the power supply system described in any one of Supplementary Notes 1 to 5.

[0086] With this configuration, a better moving body can be obtained.

[0087] 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]

[0088] 10, 10a... Power supply system 12... Power generation device 14a...First load device (load device) 14b...Second load device (load device) 16a...First power storage device (power storage device) 16b...Second power storage device (power storage device) 18a...First power supply circuit (power supply circuit) 18b...Second power supply circuit (power supply circuit) 22a, 22b... Smoothing capacitor 34a... First positive wiring (positive wiring) 34b... Second positive wiring (positive wiring) 36a... First negative wiring (negative wiring) 36b... Second negative wiring (negative wiring) 38a, 38b... First switch 40a, 40b... second switches 42a, 42b... precharge circuits 50a...First Containment (Containment) 50b...Second Containment (Containment) 66...control unit 200...mobile body

Claims

1. a power storage device; a power supply circuit for supplying DC power from the power storage device to a load device; a containment that houses the power storage device; Equipped with The power supply circuit includes: Positive and negative wiring; a first switch provided on the positive electrode wiring; A second switch provided on the negative wiring; and A power supply system, wherein one of the first switch and the second switch is disposed inside the containment, and the other of the first switch and the second switch is disposed outside the containment.

2. 2. The power supply system according to claim 1, the power supply circuit includes a precharge circuit for precharging a smoothing capacitor provided in the load device; The power supply system, wherein the precharge circuit is located outside the containment.

3. 2. The power supply system according to claim 1, The power supply system further includes a power generation device connected in parallel to the power storage device in the power supply circuit.

4. 2. The power supply system according to claim 1, a control unit that controls the operation of each of the first switch and the second switch; The control unit is disposed outside the containment.

5. 5. The power supply system according to claim 4, The control unit turns off the other of the first switch and the second switch when an abnormality is detected inside the containment.

6. A mobile object comprising the power supply system according to any one of claims 1 to 5.

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