Energy supply system

Abstract

Energy supply system, including: a first energy output section (11, 211) configured to output electrical energy supplied to an electrical load (13, 23, 213, 223); a second energy output section (21, 221) which is different from the first energy output section and is configured to output electrical energy supplied to the electrical load; a main path (1w) in a ring shape configured to provide a current path to allow a flow of current output from the first energy output section and current output from the second energy output section; a first output path (11w) that connects the main path to the first energy output section; a second output path (21w) that connects the main path to the second energy output section; a load path (13w, 23w) that connects the main path to the electrical load; a plurality of main switches (106, 206) provided and configured on the main path to switch between a state in which the main path is connected in a ring configuration and a state in which the main path is not connected in a ring configuration; and a control unit (50) configured to control the switching of the main switches, wherein the control unit is configured to activate a non-ring connection mode which turns off one of the main switches and turns on the remainder of the main switches, wherein One of the main switches is configured to provide a higher disconnection response speed than another of the main switches, and In non-ring connection mode, the control unit is configured to cause the main switch that offers a higher disconnect response speed to remain switched on.

Description

TECHNICAL FIELD

[0001] The present disclosure in this specification relates to a power supply system. STATE OF THE ART

[0002] JP 2019-62727 A discloses a power supply system that allows the main paths of multiple power systems to be connected in a ring-like manner via an intermediate switch. With respect to the multiple power systems, a faulty power system is disconnected from the other power systems. Alternatively, a power output section is disconnected from an electrical load in the faulty power system. The content of the patent specification is incorporated by reference as an explanation of the technical elements in this description.

[0003] Furthermore, US 2018 / 0 370 465 A1 describes a switching device for an on-board power supply device connected to a plurality of on-board power storage devices and loads to be arranged therebetween. When it is determined that no abnormality has occurred in a first power supply line or a second power supply line, the one of a first switch and a second switch with a larger current capacity is electrically connected, and the other is electrically disconnected. SUMMARY OF THE INVENTION

[0004] According to the configuration in the patent, the main paths of the power supply system are connected in a ring when no abnormality occurs. Therefore, at least two switches must be switched from the on state to the off state when two power systems are to be isolated. In other words, the isolation between the power systems is not completed until the states of the various switches have completely changed. The power supply system needs to be further improved from the aspect described above or other aspects not mentioned.

[0005] It is an object of the invention to provide a power supply system configured to smoothly switch the connection states in a ring-shaped main path.

[0006] This object is achieved according to the invention by an energy supply system according to one of the independent claims. Further features and advantageous developments are shown in the subclaims.

[0007] The power supply system as disclosed includes a first power output portion configured to output electrical power supplied to an electrical load; a second power output portion different from the first power output portion and configured to output electrical power supplied to the electrical load; a main path in a ring shape configured to provide a current path to allow the flow of a current output from the first power output portion and a current output from the second power output portion; a first output path connecting the main path to the first power output portion; a second output path connecting the main path to the second power output portion; a load path connecting the main path to the electrical load;a plurality of main switches provided on the main path and configured to switch between a state in which the main path is connected in a ring shape and a state in which the main path is not connected in a ring shape; and a control unit configured to control the switching of the main switches. The control unit is configured to activate a non-ring connection mode that turns off one of the main switches and turns on the rest of the remaining main switches.

[0008] The disclosed power supply system includes a control unit configured to activate the non-ring connection mode, which turns off one of the main switches and turns on the remaining main switches. In the event of a power system failure, one of the on-state switches can be turned off to turn off two of the main switches, thus disconnecting the power system. Alternatively, a switch in the off-state can be turned on to turn on all the main switches and enable a ring connection of the main path. Therefore, it is possible to provide a power supply system that enables smooth switching of the connection states of the ring-shaped main path.

[0009] The aspects disclosed in this specification employ various technical measures to achieve their respective objectives. The claims described in the claims and the reference numerals in parentheses indicate correspondence with the embodiments described below and are not intended to limit the technical scope. The objects, features, and effects disclosed in this specification will become more apparent from the following detailed description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a schematic configuration of a power supply system; Fig. 2 is a diagram showing a state in which the power supply system is mounted on a vehicle; Fig. 3 is a block diagram for the control of the power supply system; Fig. 4 is a flowchart showing the control of the power supply system; Fig. 5 is a diagram showing the on / off states of the main switches in a non-ring connection mode; Fig. 6 is a diagram showing the on / off states of the main switches in a power system disconnection mode; Fig. Fig. 7 is a diagram showing the on / off states of the main switches under the condition that an abnormal part is disconnected; Fig. Fig. 8 is a diagram showing the on / off states of the main switches under the condition that a portion other than the abnormal part is connected; Fig. 9 is a diagram showing a schematic configuration of a power supply system according to a second embodiment; and Fig. 10 is a diagram showing a schematic configuration of a power supply system according to a third embodiment. DESCRIPTION OF EMBODIMENTS

[0010] In the following description, embodiments of the present disclosure are explained with reference to the accompanying drawings. Functionally and / or structurally corresponding and / or related parts in the embodiments may be designated by the same reference numerals or by those that differ in numerals greater than or equal to the hundreds place. For the corresponding and / or related parts, reference may be made to the description of the other embodiments. First embodiment

[0011] A power supply system 1 supplies electrical power to or feeds electrical power to a device having a plurality of electrical loads driven by electrical power. The power supply system 1 can be mounted on moving objects, such as motor vehicles, which move with the aid of a drive such as a prime mover or a traction motor. The following describes the cases in which the power supply system 1 is installed in a motor vehicle. The moving objects are not limited to vehicles such as cars or two-wheelers, but can also include, for example, ships, aircraft, and transport devices. The power supply system 1 can also be used as a stationary system instead of being mounted on moving objects.

[0012] In Fig. 1, the power supply system 1 comprises two power output sections, namely an auxiliary battery 11 and a 48V battery 21. The auxiliary battery 11 and the 48V battery 21 store electrical energy, which is supplied to electrical loads. The auxiliary battery 11 and the 48V battery 21 are DC voltage sources that can be charged and discharged. The auxiliary battery 11 has a nominal voltage of, for example, 12V. The 48V battery 21 has a nominal voltage of 48V, which is higher than that of the auxiliary battery 11. Secondary batteries such as lead-acid batteries, nickel-hydride batteries, and lithium-ion batteries, as well as capacitors, can be used as the auxiliary battery 11 and the 48V battery 21. The auxiliary battery 11 has a power output section and a first power output section. The 48V battery 21 has a power output area and a second power output area.The power output sections, such as the first and second power output sections, may be any devices configured to output electrical energy or power. Therefore, the power output sections may utilize generators such as rotating electrical machines that generate electricity using batteries of various voltages or gasoline engine drive power.

[0013] The power supply system 1 includes a main path 1w, a first output path 11w, and a second output path 21w. The main path 1w configures a ring-shaped current path. The main path 1w does not always have to form a ring-shaped current path and can also be a current path capable of establishing a ring connection. The first output path 11w and the second output path 21w are current paths connected to the main path 1w. The first output path 11w connects the main path 1w and the auxiliary battery 11. The first output path 11w includes a first current sensor 19. The first current sensor 19 measures the magnitude of the current output from the auxiliary battery 11.

[0014] The second output path 21w connects the main path 1w and the 48V battery 21. The second output path 21w includes a converter 22 and a second current sensor 29. The converter 22 regulates the 48V DC voltage output by the 48V battery 21 to 12V, which corresponds to the output voltage of the auxiliary battery 11. The second current sensor 29 measures the magnitude of the current output by the 48V battery 21 and regulated by the converter 22.

[0015] The first current sensor 19 and the second current sensor 29 can use an ammeter that measures current values ​​by measuring the voltages at both ends of a resistor. It is also possible to use a magnetoelectric converter device that converts magnetic fields, e.g., in a Hall element, into electrical currents. The magnetoelectric converter device is configured to measure the current intensity without contact.

[0016] The main path 1w includes two current paths, namely a first main path 10w and a second main path 20w. The first main path 10w connects the first output path 11w and the second output path 21w. The second main path 20w is a different current path than the first main path 10w and connects the first output path 11w and the second output path 21w. In other words, the main path 1w includes the first main path 10w, which provides a clockwise current path from the first output path 11w to the second output path 21w. At the same time, the main path 1w includes the second main path 20w, which provides a counterclockwise current path from the first output path 11w to the second output path 21w.

[0017] The power supply system 1 comprises a first load path 13w, a second load path 23w, and a general load path 14w. The first load path 13w connects the main path 1w and a first electric power steering device 13. Hereinafter, the first electric power steering device 13 may be referred to as the first EPS 13. The second load path 23w connects the main path 1w to a second electric power steering device 23. Hereinafter, the second electric power steering device 23 may be referred to as the second EPS 23.

[0018] The first EPS 13 and the second EPS 23 are loads, each containing a motor that assists the steering force. The first EPS 13 and the second EPS 23 are loads that must be supplied with a stable voltage. A stable voltage is defined as a voltage within the guaranteed operating range to maintain the provided operation. The first EPS 13 and the second EPS 23 form a set of electric power steering systems. The electric power steering must continue to function even if there is a partial failure of the supply voltage. The first EPS 13 and the second EPS 23 are redundant loads. Even if one of them fails, the other can be used as an electric power steering system. The redundant loads not only form the redundant power supply path but also the redundant electric power steering system.

[0019] The first EPS 13 and the second EPS 23 are among the redundant driving loads that complement the functions required for a vehicle to drive, such as driving, turning, and stopping. The redundant driving load is not limited to the electric power steering. The redundant driving load may include, for example, a camera device for monitoring the vehicle's perimeter. The redundant driving load may include, for example, a braking device that provides stopping and deceleration functions. The redundant driving load may include lighting systems such as hazard lights and headlights. The first EPS 13 is an example of an electrical load and a first electrical load. The second EPS 23 is an example of an electrical load and a second electrical load.

[0020] If only one of the first EPS 13 and the second EPS 23 functions as a load, the steering performance will be lower than if both the first EPS 13 and the second EPS 23 function properly as loads. Typically, using both the first EPS 13 and the second EPS 23 as loads maintains good steering performance. The first EPS 13 and the second EPS 23 are loads that do not require power when the engine is not driven. These loads require power when the engine is driven to enable travel.

[0021] The general load path 14w connects the main path 1w and an interior light 14. The interior light 14 is a load or consumer that illuminates the interior of the vehicle. The interior light 14 is different from the functions required for vehicle travel, such as the electric power steering and braking function. The interior light 14 represents the load belonging to a general load, which enables the vehicle to continue driving even in the event of a malfunction. In addition to the interior light 14, the general load also includes loads such as an air conditioning system, seat heating, electric suspension, and an electric window. The general load can be connected between the 48V battery 21 and the converter 22 in the second output path 21w. It is possible to apply different voltages to the general loads, e.g., a voltage of 48V to the air conditioning system and a voltage of 12V to the interior light 14.

[0022] The first main path 10w includes a first main switch 16. The first main switch 16 includes two switches, namely a first local switch 16n and a first remote switch 16d. The first local switch 16n is arranged between the first output path 11w and the first load path 13w in the first main path 10w. The first remote switch 16d is arranged between the first load path 13w and the second output path 21w in the first main path 10w.

[0023] When the first local switch 16n is turned on, electrical power is supplied from the auxiliary battery 11 to the first EPS 13 via the first main path 10w as the current path. When the first local switch 16n is turned off, no electrical power is supplied from the auxiliary battery 11 to the first EPS 13 via the first main path 10w as the current path. Meanwhile, the on / off state of the first remote switch 16d has no influence on the power supply from the auxiliary battery 11 to the first EPS 13 by using the first main path 10w as the current path.

[0024] The second main path 20w includes a second main switch 26. The second main switch 26 includes two switches, namely a second local switch 26n and a second remote switch 26d. The second local switch 26n is arranged between the second output path 21w and the second load path 23w in the second main path 20w. The second remote switch 26d is arranged between the second load path 23w and the first output path 11w in the second main path 20w.

[0025] When the second local switch 26n is turned on, electric power is supplied from the 48V battery 21 to the second EPS 23 via the second main path 20w as a current path. When the second local switch 26n is turned off, no electric power is supplied from the 48V battery 21 to the second EPS 23 via the second main path 20w as a current path. Meanwhile, the on / off state of the second remote switch 26d has no influence on the power supply from the 48V battery 21 to the second EPS 23 by using the second main path 20w as a current path.

[0026] The first local switch 16n, the first remote switch 16d, the second local switch 26n, and the second remote switch 26d switch between the on and off states of the current path in the main path 1w. In other words, the first local switch 16n, the first remote switch 16d, the second local switch 26n, and the second remote switch 26d form a main switch 106. The switches of the main switch 106 are also called isolators.

[0027] The main switch 106 may, for example, use a mechanical relay with contacts. The main switch 106 may use a semiconductor switch such as a MOSFET or IGBT that does not have mechanical contacts. If the main switch 106 uses a semiconductor switch, two MOSFETs, for example, may be connected in series to form a main switch 106. Two adjacent main switches 106 may be considered one main switch 106 if no load or power output section is provided between the two adjacent main switches 106. The main switch 106 using a semiconductor switch can switch faster than a mechanical relay.

[0028] In the present disclosure, the first near switch 16n, the first remote switch 16d, the second near switch 26n, and the second remote switch 26d may be referred to as the main switch 106. Additionally, two or more of the first near switch 16n, the first remote switch 16d, the second near switch 26n, and the second remote switch 26d may be referred to as multiple main switches 106.

[0029] The auxiliary battery 11, the first EPS 13, and the interior lamp 14 constitute a first power system 10. The first power system 10 includes the power path composed of a part of the main path 1w, the first output path 11w, the first load path 13w, and the general load path 14w. The first power system 10 can supply electrical power to the first EPS 13 using the auxiliary battery 11. However, the configuration of the first power system 10 is not limited to this example.

[0030] The 48V battery 21 and the second EPS 23 form a second power system 20. The second power system 20 includes the power path composed of a portion of the main path 1w, the second output path 21w, and the second load path 23w. The second power system 20 can supply power to the second EPS 23 using the 48V battery 21. However, the configuration of the second power system 20 is not limited to this example.

[0031] When the first remote switch 16d is turned on, electrical power is supplied from the 48V battery 21 to the first EPS 13 via the first main path 10w as a current path. When the first remote switch 16d is turned off, electrical power is not supplied from the 48V battery 21 to the first EPS 13 via the first main path 10w as a current path. When the second remote switch 26d is turned on, electrical power is supplied from the auxiliary battery 11 to the second EPS 23 via the second main path 20w as a current path. When the second remote switch 26d is turned off, electrical power is not supplied from the auxiliary battery 11 to the second EPS 23 via the second main path 20w as a current path.

[0032] The first remote switch 16d and the second remote switch 26d are system-wide switches that switch connection states between different power systems, such as the first power system 10 and the second power system 20. Meanwhile, the first near-end switch 16n and the second near-end switch 26n are system-wide switches that switch connection states within a power system. In other words, the first remote switch 16d and the second remote switch 26d are system-wide switches that are turned on to establish a conducting state between adjacent power systems and turned off to establish a disconnecting state between the power systems. The first near-end switch 16n and the second near-end switch 26n are system-wide switches that are turned on to establish a conducting state in one power system and turned off to establish a disconnecting state in that one power system.The conductive state means a state in which excitation is possible.

[0033] Fig. 2 shows the power supply system 1 mounted on a vehicle. The main path 1w has an approximately rectangular ring shape. In the longer direction, the main path 1w is longer than half the total length of the vehicle in the longitudinal direction. In the shorter direction, the main path 1w is longer than half the total width of the vehicle in the horizontal direction. The auxiliary battery 11 is arranged in the front and right parts of the vehicle. The 48V battery 21 and the converter 22 are arranged at the rear and left parts of the vehicle. In other words, the auxiliary battery 11 and the 48V battery 21 are located on the opposite sides in the longitudinal direction of the vehicle. The auxiliary battery 11 and the 48V battery 21 are located on the opposite sides in the horizontal direction of the vehicle. The first EPS 13 and the second EPS 23 are arranged from the center forward in the longitudinal direction of the vehicle.

[0034] The first output path 11w connects the main path 1w and the auxiliary battery 11 via the shortest possible path. The first load path 13w connects the main path 1w and the first EPS 13 via the shortest possible distance. The second output path 21w connects the main path 1w and the 48V battery 21 via the shortest possible path. The second load path 23w connects the main path 1w and the second EPS 23 via the shortest possible distance.

[0035] The length of the current path from the auxiliary battery 11 to the first EPS 13 is shorter than the length from the auxiliary battery 11 to the second EPS 23. The length of the current path from the 48V battery 21 to the second EPS 23 is shorter than the length of the current path from the 48V battery 21 to the first EPS 13.

[0036] Fig. Figure 3 is a diagram showing a control system. The control unit may also be referred to as an electronic control unit (ECU) in this specification. The control unit is provided according to (a) an algorithm in the form of multiple logics in the if-then-else form or (b) a learned model tuned by machine learning, such as a neural network algorithm.

[0037] The control system with at least one computer provides the control unit. The control system may include multiple computers connected by a data communication unit. The computer includes at least one hardware processor as a processor for the hardware. The hardware processor may be provided according to the following configuration (i), (ii), or (iii).

[0038] (i) The hardware processor may refer to at least one processor core that executes a program stored in at least one memory unit. In this case, the computer is provided in the form of at least one memory unit and at least one processor core. The processor core is referred to, for example, as a CPU (Central Processing Unit), GPU (Graphics Processing Unit), or RISC-CPU. The memory is also referred to as a storage medium. Memory is a non-transitory, tangible storage medium that permanently stores processor-readable "programs and / or data" that can be read by a processor. The storage medium is provided, for example, in the form of semiconductor memories, magnetic disks, and optical disks. The program may be distributed alone or in the form of a storage medium on which the program is stored.

[0039] (ii) The hardware processor may represent a hardware logic circuit. In this case, the computer is provided in the form of a digital circuit comprising a large number of programmed logic units (gate circuits). The digital circuit is also referred to as a logic circuit arrangement, e.g., an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a programmable gate array (PGA), or a complex programmable logic device (CPLD). The digital circuits may include memory that stores programs and / or data. The computer may be provided in the form of an analog circuit. The computer may be provided as a combination of digital and analog circuits.

[0040] (iii) The hardware processor may be a combination of configurations (i) and (ii) above. Configurations (i) and (ii) are housed on different chips or a common chip. In these cases, configuration (ii) is also referred to as an accelerator.

[0041] The control unit, signal sources, and control targets represent different elements. At least some of the elements can be referred to as a block, module, or section. An element of the control system is only referred to as a functional means if the element is used intentionally.

[0042] A control unit and the technology described in this disclosure may be implemented by a dedicated computer provided by configuring a memory and a processor programmed to perform one or more functions embodied by a computer program. Furthermore, the control unit and the technology described in this disclosure may be implemented by a dedicated computer provided by configuring a processor using one or more dedicated hardware logic circuits.Furthermore, the control unit and the technique described in this disclosure may be implemented by one or more dedicated computers, each configured by a combination of memory, a processor programmed to perform one or more functions, and a processor comprised of one or more hardware logic circuits. Furthermore, the computer program may be provided as a computer-executed instruction and stored in a computer-readable, non-transferable tangible recording medium.

[0043] In Fig. 3, a control unit 50 is connected to the first current sensor 19, the second current sensor 29, and a key switch 5. The key switch 5 is operated by an occupant to switch between a driveable state and a driveable state. The control unit 50 detects a current value measured by the first current sensor 19. The control unit 50 detects a current value measured by the second current sensor 29. The control unit 50 detects information about the occupant's operation of the key switch 5. More specifically, the control unit 50 detects information about whether the key switch 5 maintains the off state, the accessory state, or the ignition state.

[0044] The control unit 50 is connected to the auxiliary battery 11, the 48V battery 21, and the converter 22. The control unit 50 controls the charging and discharging of the auxiliary battery 11 to maintain the electrical storage capacity within a suitable range. The control unit 50 controls the charging and discharging of the 48V battery 21 to maintain the electrical storage capacity within a suitable range. The control unit 50 controls the converter 22 to reduce the output voltage of the 48V battery 21 to 12V, which corresponds to the output voltage of the auxiliary battery 11.

[0045] The control unit 50 is connected to the main switch 106. In other words, the control unit 50 is connected to the first local switch 16n, the first remote switch 16d, the second local switch 26n, and the second remote switch 26d. The control unit 50 switches between the on and off states of the main switch 106 based on information such as current values ​​detected by the first current sensor 19 or the second current sensor 29.

[0046] The first remote switch 16d offers a faster disconnection response speed than the other main switches 106. The first remote switch 16d is equipped with advanced noise control measures, enabling both a high disconnection response speed and stable operation with few malfunctions. The first remote switch 16d preferably offers a disconnection response speed of a few tens of microseconds. However, all main switches 106 can have the same disconnection response speed.

[0047] The control unit 50 is connected to the first EPS 13, the second EPS 23, and the interior light 14. The control unit 50 drives the first EPS 13 and the second EPS 23 to function as an electric power steering system. The control unit 50 controls the interior light 14 to control the lighting of the vehicle interior.

[0048] In Fig. 4, the power supply system 1 begins driving to start switching control via the main switch 106. Then, in step S101, the process determines whether a non-ring connection request is issued. The non-ring connection request provides information for determining whether to activate a non-ring connection mode. If the non-ring connection request is issued, the process proceeds to step S102. If the non-ring connection request is not issued, the process proceeds to step S111.

[0049] The non-ring connection request is issued, for example, in a driving assistance mode in which the vehicle assists the occupant during driving. The non-ring connection request is issued in an automatic operation mode in which the vehicle drives independently of the occupant's operation. The non-ring connection request is issued in an abnormality detection mode that detects the presence or absence of an abnormality in the power supply system 1. The non-ring connection request is issued in a noise reduction mode that reduces the noise generated by the power supply system 1. The non-ring connection request is issued when the user operates an operation section to activate the non-ring connection mode.

[0050] However, the non-ring connection request does not always need to be issued under the conditions described above. In other words, the non-ring connection request may temporarily not be issued when the non-ring connection mode is continuously activated for a predetermined time, as described later. For example, the main path 1w may be connected in a ring configuration during the abnormality detection mode to detect the presence or absence of an abnormality in the main switch 106 or the main path 1w. In such a case, the non-ring connection request may temporarily not be issued.

[0051] The abnormality detection mode includes a control that sequentially turns the main switches 106 on and off, for example, to check the operation of the main switches 106. The abnormality detection mode includes a control that determines whether the current values ​​measured by the first current sensor 19 or the second current sensor 29 are normal, for example. The abnormality detection mode includes a control that determines whether a connected electrical load is normally supplied with power and driven, for example. When activating the automatic operation mode, it is advantageous to activate the abnormality detection mode before the automatic operation mode to confirm that the entire power supply system 1 is normal.

[0052] In step S102, the method activates the non-ring connection mode. Fig. Figure 5 shows the power supply system 1 in non-ring connection mode. In non-ring connection mode, three switches are turned on: the first local switch 16n, the first remote switch 16d, and the second local switch 26n. The second remote switch 26d remains off. The non-ring connection mode prevents the main path 1w from being connected in a ring. The non-ring connection mode allows a load to be supplied with electrical energy from two energy sources, namely the auxiliary battery 11 and the 48V battery 21, when the load is connected to any part of the main path 1w.

[0053] In non-ring connection mode, only one switch needs to be turned off, and the remaining switches of the first local switch 16n, the first remote switch 16d, the second local switch 26n, and the second remote switch 26d need to be turned on. For example, it may be advantageous to turn on all three switches—namely, the first remote switch 16d, the second local switch 26n, and the second remote switch 26d—and turn off the first local switch 16n.

[0054] In the non-ring connection mode, the current does not flow in a circular pattern. Therefore, it is easier to reduce the generated noise more effectively than in the state where the current flows in a circular pattern. The non-ring connection mode makes it possible to suppress noise generation and stably supply electrical loads with power from multiple power sources. After activating the non-ring connection mode, the process proceeds to step S111.

[0055] In step S111, the process acquires flag information. The flag information indicates whether each device of the power supply system 1 is normal. A normal flag signal is acquired when no part of the power supply system 1 is malfunctioning. An abnormal flag signal is acquired when any part of the power supply system 1 is malfunctioning. However, it may be advantageous to omit the flag signal indicating the normal state and only output the abnormal flag when an abnormality occurs.

[0056] Abnormalities that trigger the abnormality flag include a voltage surge due to a ground fault, an open circuit, contact between current paths, or an internal fault of the load. Abnormal parts that trigger the abnormality flag include loads such as the first EPS 13 and the interior light 14, power supplies such as the auxiliary battery 11, and the wiring that forms the current path. If multiple parts malfunction, multiple abnormalities will be reported.

[0057] For example, the current value measured by the first current sensor 19 or the second current sensor 29 may exceed a threshold value. Then, the abnormality flag is issued based on the determination that an abnormality such as a ground fault exists. An abnormal value can be determined based on the temporal change of the current value measured by the first current sensor 19 or the second current sensor 29. Then, the abnormality flag is issued based on the determination that an abnormality such as a ground fault exists. Instead of an ammeter, a voltmeter can also be used as the first current sensor 19 or the second current sensor 29. Then, it is possible to determine the presence or absence of an abnormality based on the voltage level or the temporal change of the voltage. A temperature sensor can be used to detect abnormal heat generation. If an abnormality such asIf an abnormality, such as a ground fault, is detected, the abnormality flag is raised. After the flag information is acquired, the process proceeds to step S112.

[0058] In step S112, the process determines whether an abnormality flag is set. If the abnormality flag is set, the process determines that the abnormality occurring in power supply system 1 needs to be handled. The process then proceeds to step S113. If no abnormality flag is set, the process determines that power supply system 1 is operating normally. The process then terminates the switching control via main switch 106.

[0059] The following description explains the control flow of the power supply system 1 using an example in which a ground fault occurs at the first EPS 13 in the non-ring connection mode. In step S113, a power system disconnection mode is activated. Fig. 6 shows the power supply system 1 in the power system disconnection mode. The power system disconnection mode changes the first remote switch 16d from the on state to the off state. The first power system 10 is disconnected from the second power system 20 based on the second remote switch 26d and the first remote switch 16d under the following conditions. The second remote switch 26d remains off before the power system disconnection mode is activated. The first remote switch 16d is switched from the on state to the off state as described above. Therefore, the first EPS 13 is supplied with electric power only from the auxiliary battery 11. The second EPS 23 is supplied with power only from the 48V battery 21. In other words, the main path 1w is divided into two parts: the part that receives power from the auxiliary battery 11 and the part that receives power from the 48V battery 21.

[0060] When the power system is disconnected, electrical power is not properly supplied to the faulty power system. In other words, the first power system 10 includes the first EPS 13 in which the ground fault occurs. A large current continues to flow from the auxiliary battery 11 to the first EPS 13 affected by the ground fault. Therefore, the electrical power stored in the auxiliary battery 11 is heavily consumed, reducing the potential of the first main path 10w. Therefore, electrical power cannot be properly supplied to the loads connected to the first power system 10.

[0061] The electrical power is properly supplied to a power system free of abnormalities. In other words, the second power system 20 does not include the first EPS 13 in which the ground fault occurs. No current flows from the 48V battery 21 to the first EPS 13 affected by the ground fault. Therefore, the second EPS 23 connected to the second power system 20 maintains an appropriate power supply from the 48V battery 21. When the power system is disconnected, the second EPS 23 can function properly and provide the electric power steering function. After activating the power system disconnection mode, the process proceeds to step S114.

[0062] In step S114, the method identifies an abnormal part. The first current sensor 19 and the second current sensor 29 are used to identify an abnormal part. First, it is determined which of the power systems is malfunctioning. If the power system is disconnected, it can be determined that an abnormality occurs in the power system, causing the first current sensor 19 or the second current sensor 29 to measure an abnormal current value. It can be determined that no abnormality occurs in the power system, causing the first current sensor 19 or the second current sensor 29 to measure an appropriate current value. If the first EPS 13 causes a ground fault, the first current sensor 19 measures an abnormal current value. Therefore, it is possible to determine that a part of the first power system 10 is malfunctioning.

[0063] Next, the process identifies an abnormal part in the first energy system 10, which is classified as abnormal. As in Fig. As shown in Figure 7, the first proximal switch 16n is turned off while the power system remains disconnected. In other words, the system-internal switch is turned off in the power system that has been determined to be abnormal. Then, the first main path 10w is split into two current paths. One current path is connected to the auxiliary battery 11 and the interior lamp 14. The other current path is connected to the first EPS 13. The second proximal switch 26n remains turned on. The second EPS 23 can be stably supplied with electrical power from the 48V battery 21 even if the abnormal part is detected.

[0064] The method confirms the current value of the first current sensor 19 while separating the first main path 10w into two current paths. If the first current sensor 19 indicates an appropriate current value, it can be determined that an abnormality exists in the part of the first main path 10w excluding the first current sensor 19. If the first current sensor 19 indicates an abnormal current value, it can be determined that an abnormality exists in the part of the first main path 10w including the first current sensor 19. If the first EPS 13 causes a ground fault, the first current sensor 19 measures a corresponding current value. Therefore, it can be determined that an abnormality occurs in the first EPS 13 or the current path connected to the first EPS 13 in the first main path 10w. After identifying the abnormal part, the method proceeds to step S115.

[0065] In step S115, the identified abnormal part is disconnected from the main path 1w. Specifically, the switches on both sides of the part connected to the abnormal part in the main path 1w are turned off. If the first EPS 13 causes a ground fault, the first local switch 16n and the first remote switch 16d are turned off. After the abnormal part is disconnected, the process proceeds to step S116.

[0066] In step S116, the method connects the current path except for the abnormal part to the main path 1w. Specifically, all switches except the off switch are turned on to disconnect the abnormal part from the main path 1w. If the first EPS 13 causes a ground fault, as shown in Fig. As shown in Figure 8, the second near-ground switch 26n and the second remote-ground switch 26d are turned on. Then, the second EPS 23 can be supplied with power from two power sources, namely the 48V battery 21 and the auxiliary battery 11. In other words, the second EPS 23 can be stably supplied with electric power from multiple power sources while being unaffected by the ground fault. The switching control via the main switch 106 ends after the current path is connected except for the abnormal part. However, the control flow can be performed repeatedly until the key switch 5 is turned off.

[0067] According to the embodiment described above, the control unit 50 can activate the non-ring connection mode, which turns off one of the plurality of main switches 106 and turns on the remaining main switches 106. One of the turned-on main switches 106 can be changed to the off state in the non-ring connection mode to separate the main path 1w into multiple power paths. Therefore, it is possible to disconnect the main path 1w more quickly than when two or more main switches 106 change from the on state to the off state. Alternatively, the turned-off main switch 106 can be set to the on state in the non-ring connection mode to connect the main path 1w in a ring shape. It is possible to quickly switch between the ring connection mode in which all the main switches 106 are turned on and the power system disconnection mode in which two or more of the main switches 106 are turned off.It is possible to provide the power supply system 1 that can smoothly switch between the connection states of the main path 1w.

[0068] By using multiple power sources such as the auxiliary battery 11 and the 48V battery 21, current can be prevented from flowing cyclically through the main path 1w while maintaining a stable potential of the main path 1w. It is possible to stably supply electrical energy to the loads and suppress noise caused by a current flowing cyclically through the main path 1w at a given time.

[0069] In the non-ring connection mode, the control unit 50 turns off the second remote switch 26d and turns on the first local switch 16n, the first remote switch 16d, and the second local switch 26n. In other words, the first remote switch 16d or the second remote switch 26d is turned off, and the remaining main switches 106 are turned on. Therefore, the auxiliary battery 11 can supply power to the first EPS 13 via the first main path 10w. The 48V battery 21 can supply power to the second EPS 23 via the second main path 20w. In addition, electric power is supplied between the first power system 10 and the second power system 20. The entire power supply system 1 can stably supply electric power to the first EPS 13 and the second EPS 23.

[0070] The control unit 50 activates the power system disconnection mode when it detects the occurrence of an abnormality in the first power system 10 or the second power system 20. The power system disconnection mode turns off the first remote switch 16d and the second remote switch 26d and turns on the first local switch 16n and the second local switch 26n. It is possible to disconnect the faulty power system from the abnormality-free power system. Therefore, it is possible to maintain the functions of the normal power system. In other words, it is possible to continue operating units such as the electric power steering systems, which must continue operating even during a partial power failure.

[0071] After activating the power system disconnection mode, the control unit 50 turns off the main switches 106 located at both ends of a portion of the main path 1w connected to the abnormal part, and turns on the remaining main switches 106. It is possible to select and disconnect only the portion near the abnormal part, rather than completely disconnecting the specific power system from the main path 1w. If the first EPS 13 causes a ground fault, the portion connected to the first EPS 13 is disconnected from the first power system 10. Current can be prevented from flowing through the first EPS 13 until the remaining battery level of the auxiliary battery 11 drops to zero. The auxiliary battery 11 belonging to the first power system 10 can be used to supply power to the second EPS 23 belonging to the second power system 20. The main path 1w allows the connection of parts that do not have abnormalities.It is possible to increase redundancy and operate the power supply system 1 more easily than a state where several power systems are separated from each other.

[0072] The first EPS 13, connected to the first power system 10, and the second EPS 23, connected to the second power system 20, supplement the electric power steering function required for moving objects. Even if one of the first EPS 13 and the second EPS 23 as loads is improperly supplied with electric power, it is possible to easily supply electric power to the remaining load. It is possible to easily prevent the steering function required for vehicle travel from being completely lost compared to the case where the first EPS 13 and the second EPS 23 are connected in the same power system. Therefore, it is easy to maintain a drivable state even if the power supply system 1 fails.

[0073] In the non-ring connection mode, the control unit 50 keeps the first remote switch 16d, which can achieve high disconnection response speeds among the multiple main switches 106, turned on. It is possible to quickly switch the main switches 106 by turning off the first remote switch 16d.

[0074] It is possible to quickly switch from non-ring connection mode to power system disconnect mode by replacing one of the main switches 106 with a switch that enables high disconnect response speeds. The switch that enables high disconnect response speeds requires advanced noise control measures and is therefore typically expensive. It is possible to slightly reduce the cost of the main switches 106 compared to using switches with high disconnect response speeds for two or more main switches 106.

[0075] The control unit 50 activates the non-ring connection mode during the abnormality detection mode to detect the presence or absence of abnormalities. This reduces the noise components of the current used to detect the presence or absence of abnormalities. Therefore, it is possible to avoid a situation where excessive noise is generated in the abnormality detection mode, preventing accurate abnormality detection.

[0076] The control unit 50 activates the non-ring connection mode during the driving assistance mode or automatic operation. This can reduce the noise generated in the main path 1w. It is possible to suppress a large amount of noise that interferes with the normal operation of the electric power steering function and the perimeter monitoring function required for the driving assistance mode and the automatic operation mode. In particular, the automatic operation mode requires fast and complex control. Therefore, it is very important to activate the non-ring connection mode, which can reduce noise effects in the automatic operation mode.

[0077] The abnormality detection mode detects a ground fault. It is easy to prevent a situation in which a current flows outward from the ground fault and the first EPS 13 and the second EPS 23, as redundant driving loads, are not supplied with power.

[0078] The main switch 106 does not need to consist of four switches. The main switch 106 may consist of two switches by providing one switch for each of the power paths, such as the first main path 10w and the second main path 20w. This reduces the number of switches used for the power supply system 1, and simplifies the configuration of the power supply system 1 and the control contents related to the main switch 106.

[0079] If it is determined in step S101 that the request for a non-ring connection is not granted, the ring connection mode can be activated before proceeding to step S111. The ring connection mode turns on all main switches 106 to connect the main path 1w in a ring shape. It is possible to optimize the current path from the power supply to the load by connecting the main path 1w in a ring shape. The ring-shaped main path 1w includes a clockwise current path and a counterclockwise current path. The current flows preferentially through the current path, which ensures a smooth current flow. The energy loss of the current flowing through the main path 1w can be slightly reduced compared to a non-ring connection. The current path is not immediately interrupted even if an interruption occurs somewhere in the main path 1w.The state remains essentially the same as when the non-ring connection mode is activated. Therefore, it is easy to maintain a stable power supply to the loads.

[0080] If it is determined in step S112 that the abnormality flag is on, the user can be notified of the occurrence of an abnormality. It is possible to provide countermeasures against abnormalities so that the user can detect the occurrence of an abnormality and perform evasive driving by switching from automatic operation to manual operation. The information to be notified preferably includes not only the presence or absence of an abnormality, but also information such as the types or parts of abnormalities. This allows the user to accurately determine the situation based on multiple pieces of information. It is easier for the user to take appropriate countermeasures.

[0081] A TOR (Take Over Request) can be initiated if it is determined in step S112 that the abnormality flag is on and automatic operation is activated. The TOR issues a request to transfer driving responsibility to a driver to terminate automatic operation in the event of an abnormality. If the driver responds to the TOR, automatic operation transitions to manual operation. If the driver does not respond to the TOR, an MRM (Minimal Risk Maneuver) begins while maintaining automatic operation. The MRM provides operational control that allows automatic operation to stop the vehicle in a lane or near a shoulder.

[0082] The first remote switch 16d may be provided with an automatic shutdown function instead of acquiring the flag information in step S111, determining the presence or absence of the abnormality flag in step S112, and activating the power system disconnection mode in step S113. The automatic shutdown function turns off switches regardless of the control signals output from the control unit 50. The automatic shutdown function may be realized by providing the first remote switch 16d with an overcurrent detection section, and automatically turning off the first remote switch 16d when the flowing current exceeds a threshold current. However, the automatic shutdown function may also be implemented in other ways. For example, the overcurrent detection section for detecting an overcurrent may be replaced by an undervoltage detection section for detecting an undervoltage.The first remote switch 16d, which includes the low voltage detection section, is automatically turned off when the applied voltage is lower than a threshold voltage.

[0083] In this case, it is possible to save the time required for the control unit 50 to detect the abnormality flag during the period between the occurrence of an abnormality and the activation of the power system disconnect mode. Furthermore, it is possible to save the time required for the control unit 50 to determine the presence or absence of the abnormality flag. Furthermore, it is possible to save the time between the time when the control unit 50 outputs a signal to turn off the first remote switch 16d and the time when the first remote switch 16d receives the signal. The first remote switch 16d can be turned off more quickly than when using the control unit 50 to turn off the first remote switch 16d.

[0084] The first remote switch 16d can be configured as a switch that can be turned off based on two methods: a control signal from the control unit 50 and overcurrent detection in the overcurrent detection section. The first remote switch 16d with the automatic shutdown function offers a faster shutdown response speed than other switches without the automatic shutdown function.

[0085] The auxiliary battery 11 is mounted at the front and right sides of the vehicle. The 48V battery 21 and the converter 22 are installed at the rear and left sides of the vehicle. The 48V battery 21 can reliably maintain its function as a normal power source when an external impact is applied to the front or right side of the vehicle. The auxiliary battery 11 can reliably maintain its function as a normal power source when an external impact is applied to the rear or left side of the vehicle. In other words, the auxiliary battery 11 and the 48V battery 21 are arranged to ensure the positional relationship between them, so that both the auxiliary battery 11 and the 48V battery 21 are easily prevented from malfunctioning simultaneously, even if any part of the vehicle is damaged. Second embodiment

[0086] The present embodiment is a modification of the previous embodiment. In the present embodiment, the power supply system 1 is equipped with three power systems.

[0087] In Fig. 9, the power supply system 1 includes four power output sections, namely a first auxiliary battery 211, a second auxiliary battery 221, a high-voltage battery 231h, and a motor generator 231g. A motor generator 231g may be referred to as MG 231g hereinafter. The first auxiliary battery 211, the second auxiliary battery 221, and a high-voltage battery 231h store electrical energy that is supplied to the electrical loads. The first auxiliary battery 211, the second auxiliary battery 221, and the high-voltage battery 231h are DC voltage sources that can be charged and discharged. The first auxiliary battery 211 and the second auxiliary battery 221 each have a rated voltage of, for example, 12 V. The first auxiliary battery 211 is an example of a power output part and a first power output part. The second auxiliary battery 221 is an example of a power output section and a second power output section.

[0088] The high-voltage battery 231h is used in vehicles such as electric, hybrid, and fuel cell vehicles. The high-voltage battery 231h stores electrical energy, which is supplied to the MG 322, which acts as a traction motor. The high-voltage battery 231h has a nominal voltage of, for example, 300 V. The MG 231g not only functions as a traction motor, but also as a generator, generating electricity by using regenerative energy generated, for example, when the vehicle decelerates. The MG 231g is also known as a rotating electrical machine. An inverter converts DC voltage from the high-voltage battery 231h into AC voltage, which is supplied to the MG 231g. The high-voltage battery 231h is an example of a power output part. The MG 231g is an example of a power output range.

[0089] The first output path 11w is a current path connecting the first auxiliary battery 211 to the main path 1w. The first current sensor 19 measures the magnitude of the current output by the first auxiliary battery 211. The second output path 21w is a current path connecting the second auxiliary battery 221 to the main path 1w. The second current sensor 29 measures the magnitude of the current output by the second auxiliary battery 221.

[0090] The power supply system 1 includes a third output path 231w. The third output path 231w is a current path connected to the main path 1w. The third output path 231w connects the main path 1w to the high-voltage battery 231h and the MG 231g. The third output path 231w includes a converter 232 and a third current sensor 239. The converter 232 reduces the high DC voltage output by the high-voltage battery 231h or the MG 231g to 12V, which corresponds to the output voltage of the first auxiliary battery 211 and the second auxiliary battery 221. The third current sensor 239 measures the magnitude of the current output by the high-voltage battery 231h or the MG 231g and regulated by the converter 232.

[0091] The main path 1w includes a third main path 230w. The third main path 230w connects the third output path 231w and the first output path 11w of the main path 1w.

[0092] The energy supply system 1 comprises a third load path 233w. The first load path 13w connects the main path 1w and a first camera 213. The second load path 23w connects the main path 1w to a second camera 223. The third load path 233w connects the main path 1w and a third camera 233.

[0093] The first camera 213, the second camera 223, and the third camera 233 are imaging devices for environmental monitoring. The first camera 213, the second camera 223, and the third camera 233 are loads that require a stable power supply. The first camera 213, the second camera 223, and the third camera 233 constitute a set of environmental monitoring devices. Even if one of the first camera 213, the second camera 223, and the third camera 233 fails, the remaining cameras can function as environmental monitoring devices. The redundancy scheme applies not only to the power supply path but also to the loads that constitute the environmental monitoring devices. Normally, the first camera 213, the second camera 223, and the third camera 233 are used as loads to maintain favorable conditions for monitoring capability.

[0094] The first camera 213, the second camera 223, and the third camera 233 do not all have to be configured as the same imaging devices. For example, the first camera 213 may be an imaging device. The second camera 223 may be a lidar. The third camera 233 may be a millimeter-wave radar. Different devices such as the imaging device, the lidar, and the millimeter-wave radar may be used to make the perimeter monitoring function redundant. The first camera 213 is an example of an electrical load and a first electrical load. The second camera 223 is an example of an electrical load and a second electrical load. The third camera 233 is an example of an electrical load.

[0095] The third main path 230w includes a third main switch 236. The third main switch 236 includes two switches, namely a third local switch 236n and a third remote switch 236d. The third local switch 236n is arranged between the third output path 231w and the third load path 233w in the third main path 230w. The third remote switch 236d is arranged between the third load path 233w and the first output path 11w in the third main path 230w. The third local switch 236n and the third remote switch 236d form a main switch 206. In other words, the main switch 206 consists of six switches, namely the first local switch 16n, the first remote switch 16d, the second local switch 26n, the second remote switch 26d, the third local switch 236n, and the third remote switch 236d.

[0096] When the third proximity switch 236n is turned on, electrical power is supplied from the high-voltage battery 231h and the MG 231g to the third camera 233 based on the third main path 230w as the current path. When the third proximity switch 236n is turned off, no electrical power is supplied from the high-voltage battery 231h and the MG 231g to the third camera 233 based on the third main path 230w as the current path. Meanwhile, the on / off state of the third remote switch 236d has no effect on the power supply from the high-voltage battery 231h or the MG 231g to the third camera 233 based on the third main path 230w as the current path.

[0097] The first auxiliary battery 211, the first camera 213, and the interior light 14 form the first power system 10. The first power system 10 includes a power path that includes a portion of the main path 1w, the first output path 11w, the first load path 13w, and the general load path 14w. The first power system 10 can supply power to the first camera 213 via the first auxiliary battery 211.

[0098] The second auxiliary battery 221 and the second camera 223 form the second power system 20. The second power system 20 includes a power path that includes a portion of the main path 1w, the second output path 21w, and the second load path 23w. The second power system 20 can supply power to the second camera 223 using the second auxiliary battery 221.

[0099] The high-voltage battery 231h, the MG 231g, and the third camera 233 form a third power system 230. The third power system 230 includes a power path that includes a portion of the main path 1w, the third output path 231w, and the third load path 233w. The third power system 230 can supply power to the third camera 233 using the high-voltage battery 231h or the MG 231g.

[0100] When the third remote switch 236d is turned on, electrical power is supplied from the first auxiliary battery 211 to the third camera 233, based on the third main path 230w as the power path. When the third remote switch 236d is turned off, no electrical power is supplied from the first auxiliary battery 211 to the third camera 233, based on the third main path 230w as the power path.

[0101] The third remote switch 236d is a cross-system switch that switches connection states between different energy systems, such as the first energy system 10 and the third energy system 230. The third local switch 236n is an intra-system switch that switches connection states within an energy system. In other words, the third remote switch 236d is a cross-system switch that is turned on to establish a conductive state between adjacent energy systems and turned off to establish a disconnecting state between the energy systems. The third local switch 236n is an intra-system switch that is turned on to establish a conductive state in the third energy system 230 and turned off to establish a disconnecting state in the third energy system 230.

[0102] In the non-ring connection mode, only one of the main switches 206 for the main path 1w is turned off, and the remaining switches are turned on. For example, the second remote switch 26d is turned off. The first near switch 16n, the first remote switch 16d, the second near switch 26n, the third near switch 236n, and the third remote switch 236d are turned on. Consequently, the main path 1w is not connected in a ring at one part, namely the second remote switch 26d.

[0103] In power system isolation mode, all system-internal switches are turned off and all system-internal switches are turned on. In other words, the first remote switch 16d, the second remote switch 26d, and the third remote switch 236d are turned off. The first local switch 16n, the second local switch 26n, and the third local switch 236n are turned on. This results in various power systems, such as the first power system 10, the second power system 20, and the third power system 230, being isolated from each other.

[0104] The above-described embodiment can maintain the stable potential of the main path 1w and prevent the current from circularly flowing through the main path 1w at a certain time based on the power supply from four power sources such as the first auxiliary battery 211, the second auxiliary battery 221, the high-voltage battery 231h, and the MG 231g.

[0105] The first camera 213, the second camera 223, and the third camera 233 complement the perimeter monitoring function required for the movement of moving objects. In other words, the first camera 213, the second camera 223, and the third camera 233 are redundant driving loads. Even if one of the first camera 213, the second camera 223, and the third camera 233 as loads is not properly supplied with power, it is possible to easily supply power to the remaining loads properly. This can prevent the surrounding monitoring function required for vehicle travel from being completely lost. Even if the power supply system 1 malfunctions, the driveable state can be easily maintained by maintaining automatic operation or driving assistance.

[0106] The third local switch 236n and the third remote switch 236d can be considered system-wide switches. In this case, the third local switch 236n and the third remote switch 236d form system-wide switches that switch between the conducting and non-conducting states between the first energy system 10 and the second energy system 20.

[0107] The third power system 230 can be treated as part of the first power system 10. Alternatively, the third power system 230 can be treated as part of the second power system 20. In other words, a power system can comprise multiple power output sections via the main switch 206. If the third power system 230 is treated as part of the first power system 10, the first local switch 16n, the third local switch 236n, and the third remote switch 236d can be considered system-internal switches in the first power system 10. If the third power system 230 is considered part of the second power system 20, the second local switch 26n, the second remote switch 26d, and the third local switch 236n can be considered system-internal switches in the second power system 20. In this case, the third remote switch 236d can be considered a cross-system switch between the first power system 10 and the second power system 20.

[0108] The energy supply system 1 is not limited to containing two or three energy systems. The energy supply system 1 may include four or more energy systems.

[0109] A power system is not limited to containing only one load path. For example, the first power system 10 may include multiple first charging paths 13w to supply power to the first EPS 13 and the first camera 213. Third embodiment

[0110] The present embodiment is a modification of the previous embodiments. According to the present embodiment, a bypass path 302w is connected to the annular main path 1w.

[0111] In Fig.10, one end of the bypass path 302w is connected between the first output path 11w and the first load path 13w of the first main path 10w. The other end of the bypass path 302w is connected between the second output path 21w and the second load path 23w of the second main path 20w. The bypass path 302w connects the first energy system 10 and the second energy system 20.

[0112] The bypass path 302w includes a bypass switch 303. When the bypass switch 303 is turned on, the bypass path 302w is conductive. When the bypass switch 303 is turned off, the bypass path 302w is non-conductive.

[0113] When the bypass switch 303 is turned on in the ring connection mode, the current supplied by the auxiliary battery 11 can flow through three current paths. The three current paths include the one that passes through the first main path 10w, the one that passes through the second main path 20w, and the one that passes through the bypass path 302w. The bypass switch 303 is turned off in the non-ring connection mode and the power system disconnection mode.

[0114] The above-described embodiment includes the bypass path 302w and the bypass switch 303. When the bypass switch 303 is turned on to make the bypass path 302w conductive, the electrical power can be supplied to the loads via a current path shorter than the first main path 10w or the second main path 20w. In other words, the current can flow through the optimal current path selected from the three current paths such as the first main path 10w, the second main path 20w, and the bypass path 302w according to the efficiency of current flow. It is possible to shorten the current path for power supply. Therefore, it is possible to slightly reduce the electrical resistance of the current path and provide a relatively lossless power supply.

[0115] In non-ring connection mode or power system disconnection mode, bypass switch 303 can be turned off to disconnect bypass path 302w. This can prevent a situation where a current flows through bypass path 302w, preventing the non-ring connection mode or power system disconnection mode from being properly activated. Other embodiments

[0116] The disclosure of, for example, this description and the drawings is not limited to the described embodiments. The disclosure includes the described embodiments and modified forms provided by those skilled in the art based on the embodiments. For example, the disclosure is not limited to combinations of the parts and / or elements described in the embodiments. The disclosure is conceivable in various combinations. The disclosure may include an additional part that can be added to the embodiments. The disclosure includes an embodiment that does not include the parts and / or elements of the embodiments. The disclosure includes an exchange or combination of the parts and / or elements between one embodiment and another embodiment.The disclosed technical scope is not limited to the description of the embodiments. Some of the disclosed technical areas should be understood as being available in the description of the claims and encompassing all changes in meaning and scope comparable to the description of the claims.

[0117] The description of the claims does not limit the disclosure of, for example, the specification and the drawings. The disclosure of the specification and the drawings encompasses, for example, the technical ideas described in the claims and, moreover, covers a wider variety of technical ideas than the technical ideas described in the claims. Therefore, various technical ideas can be derived, for example, from the disclosure of the specification and the drawings without being limited by the description of the claims.

Claims

[1] Energy supply system, with: a first power output section (11, 211) configured to output electrical power supplied to an electrical load (13, 23, 213, 223); a second power output section (21, 221) different from the first power output section and configured to output electrical power supplied to the electrical load; a main path (1w) in a ring shape configured to provide a current path to allow a flow of a current output from the first power output section and a current output from the second power output section; a first output path (11w) connecting the main path to the first power output section; a second output path (21w) connecting the main path to the second power output section; a load path (13w, 23w) connecting the main path to the electrical load; a plurality of main switches (106, 206) provided on the main path and configured to switch between a state in which the main path is connected in the ring shape and a state in which the main path is not connected in the ring shape; and a control unit (50) configured to control the switching of the main switches, wherein the control unit is configured to activate a non-ring connection mode that switches off one of the main switches and switches on a remainder of the remaining main switches, wherein one of the main switches is configured to provide a higher disconnect response speed than another of the main switches, and in non-ring connection mode, the control unit is configured to cause the main switch that provides a higher disconnect response speed to remain on. [2] Energy supply system, with: a first power output section (11, 211) configured to output electrical power supplied to an electrical load (13, 23, 213, 223); a second power output section (21, 221) different from the first power output section and configured to output electrical power supplied to the electrical load; a main path (1w) in a ring shape configured to provide a current path to allow a flow of a current output from the first power output section and a current output from the second power output section; a first output path (11w) connecting the main path to the first power output section; a second output path (21w) connecting the main path to the second power output section; a load path (13w, 23w) connecting the main path to the electrical load; a plurality of main switches (106, 206) provided on the main path and configured to switch between a state in which the main path is connected in the ring shape and a state in which the main path is not connected in the ring shape; and a control unit (50) configured to control the switching of the main switches, wherein the control unit is configured to activate a non-ring connection mode that switches off one of the main switches and switches on a remainder of the remaining main switches, wherein the main path includes a first main path (10w) configured to connect the first output path to the second output path, and a second main path (20w) different from the first main path and configured to connect the first output path to the second output path, the load path includes a first load path (13w) connected to the first main path, and a second load path (23w) connected to the second main path, the main switch includes a first local switch (16n) provided between the first output path and the first load path in the first main path, a first remote switch (16d) provided between the first load path and the second output path in the first main path, a second proximity switch (26n) provided between the second output path and the second load path in the second main path, and a second remote switch (26d) provided between the second load path and the first output path in the second main path, and in non-ring connection mode, the control unit is configured to turn off either the first remote switch or the second remote switch and turn on a remainder of the remaining main switches. [3] Energy supply system, with: a first power output section (11, 211) configured to output electrical power supplied to an electrical load (13, 23, 213, 223); a second power output section (21, 221) different from the first power output section and configured to output electrical power supplied to the electrical load; a main path (1w) in a ring shape configured to provide a current path to allow a flow of a current output from the first power output section and a current output from the second power output section; a first output path (11w) connecting the main path to the first power output section; a second output path (21w) connecting the main path to the second power output section; a load path (13w, 23w) connecting the main path to the electrical load; a plurality of main switches (106, 206) provided on the main path and configured to switch between a state in which the main path is connected in the ring shape and a state in which the main path is not connected in the ring shape; and a control unit (50) configured to control the switching of the main switches, wherein the control unit is configured to activate a non-ring connection mode that switches off one of the main switches and switches on a remainder of the remaining main switches, and wherein the control unit is configured to activate the non-ring connection mode during a driver assistance mode or an automatic operation mode. [4] The power supply system according to any one of claims 1 to 3, wherein when a malfunction is detected in a power system (10, 20), the control unit is configured to activate a power system disconnection mode that turns off the first remote switch and the second remote switch and turns on the first local switch and the second local switch. [5] The power supply system according to claim 4, wherein, after activating the power system disconnection mode, the control unit is configured to turn off main switches of the main switches at both ends of a part connected to a faulty section in the main path and turn on one of the remaining main switches. [6] A power supply system mounted on a movable object according to any one of claims 1 to 5, further comprising: a first electrical load (13, 213) connected as the electrical load to the first load path; and a second electrical load (23, 223) connected as the electrical load to the second load path, wherein the first electrical load and the second electrical load are configured to complement each other's function required for the movement of the movable object. [7] The power supply system according to any one of claims 1 to 6, wherein the control unit is configured to activate the non-ring connection mode during an abnormality detection mode that detects the presence or absence of an abnormality.

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