ELECTRIC CAR CONTROL SYSTEM

Abstract

An electric vehicle control system (1, 2) comprises a power conversion device (51, 52) installed in an electric vehicle (10) and electrically connected in series with a circuit breaker (70) which is electrically connected to a power source (90), wherein the power conversion device is configured to convert power supplied by the power source into DC power or AC power and to record a fault in response to the opening of the circuit breaker or to the cessation of a power supply from a control power source of the electric vehicle; and a vehicle information management device (60) installed in the electric vehicle and communicatively connected to the power conversion device.In the event of the power conversion device being disconnected from the power source by opening the circuit breaker, the vehicle information management device sends an initial signal to the power conversion device before the circuit breaker is opened, or in the event of a power supply being stopped from the control power source of the electric vehicle, the vehicle information management device sends the initial signal to the power conversion device before a power supply from the control power source of the electric vehicle is stopped, and the power conversion device that has received the initial signal sent by the vehicle information management device holds a fault recording for a predetermined duration.

Description

Technical field

[0001] The present disclosure relates to an electric vehicle control system that is supplied with energy by an energy or power source. Technological background

[0002] Electric vehicles feed power received from a substation via overhead lines through a circuit breaker to a power conversion device, which converts the power into the desired alternating current (AC) power and supplies the converted AC power to electric motors. Patent literature 1 discloses the inclusion of a circuit breaker, a plurality of inverters, a plurality of interconnecting circuits, and a control device, and the supply of power via the circuit breaker to the plurality of inverters. Patent literature 1 also discloses that if an anomaly or abnormality occurs in an AC circuit section formed by a set of interconnecting circuits and the electric motor, the control device opens the circuit breaker and then stops the inverter.stops in which the abnormality occurs, thereby electrically disconnecting the AC circuit section with the abnormality from a power supply system. List of citations from patent literature

[0003] Patent literature 1: Unexamined Japanese patent application with publication number 2018-191487 Summary of the invention: Technical problem

[0004] In a case where the circuit breaker opens even though no fault occurs in the power conversion device in an electric vehicle, the power conversion device might register a fault indicating that the circuit breaker opened due to an overcurrent. If a fault is recorded in the power conversion device, the cause must be investigated during a vehicle inspection, which increases the inspection time.

[0005] In view of the above circumstances, it is the purpose of the present disclosure to provide an electric vehicle control system capable of reducing inspection time.

[0006] To achieve the above-mentioned task, an electric vehicle control system according to the present disclosure comprises a power conversion device installed in an electric vehicle and electrically connected in series with a circuit breaker which is electrically connected to a power source, wherein the power conversion device is configured to convert power supplied by the power source into DC power or AC power and to record a fault in response to the opening of the circuit breaker or to the interruption or stopping of a power supply from a control power source of the electric vehicle; and a vehicle information management device installed in the electric vehicle and communicatively connected to the power conversion device.In the event of the power conversion device being disconnected from the power source by opening the circuit breaker, the vehicle information management device sends an initial signal to the power conversion device before the circuit breaker is opened, or in the event of a power supply being stopped from the control power source of the electric vehicle, the vehicle information management device sends the initial signal to the power conversion device before a power supply from the control power source of the electric vehicle is stopped, and the power conversion device that has received the initial signal sent by the vehicle information management device holds a fault recording for a predetermined duration. Advantageous effects of the invention

[0007] The electric vehicle control system of the present disclosure comprises a power conversion device installed in an electric vehicle and electrically connected in series with a circuit breaker which is electrically connected to a power source, wherein the power conversion device is configured to convert power supplied by the power source into DC power or AC power and to record a fault in response to the opening of the circuit breaker or to the cessation of a power supply from a control power source of the electric vehicle; and a vehicle information management device installed in the electric vehicle and communicatively connected to the power conversion device.In the event of the power conversion device being disconnected from the power source by opening the circuit breaker, the vehicle information management device sends an initial signal to the power conversion device before the circuit breaker is opened, or in the event of a power supply being stopped from the electric vehicle's control power source, the vehicle information management device sends the initial signal to the power conversion device before the power supply from the electric vehicle's control power source is stopped, and the power conversion device that has received the initial signal sent by the vehicle information management device suspends a fault recording for a predetermined duration, thus preventing a fault in the power conversion device from being recorded and reducing the time required for vehicle inspections. Brief description of the drawings Fig. Figure 1 represents a diagram illustrating a schematic configuration of an electric vehicle equipped with an electric vehicle control system 1 according to embodiment 1; Fig. Figure 2 shows a schematic diagram illustrating a configuration of the electric vehicle control system 1 according to embodiment 1; Fig. Figure 3 shows a diagram illustrating an overview of a power conversion device of the electric vehicle control system 1 according to embodiment 1; Fig. Figure 4 shows a flowchart illustrating an example of an operating mode of the electric vehicle control system 1 according to embodiment 1; Fig. Figure 5 represents a flowchart illustrating an example of an operating mode of the electric vehicle control system 1 according to embodiment 1; Fig. Figure 6 presents a flowchart illustrating an example of an operating mode of the electric vehicle control system 2 according to embodiment 2; and Fig. Figure 7 presents a diagram illustrating a general configuration example of hardware implementing an electric vehicle control system according to one embodiment. Description of the embodiments

[0008] Embodiments of an electric vehicle control system according to the present disclosure are described below with reference to the drawings. In the description and drawings of the present disclosure, components with substantially the same functionality are designated by the same reference numerals to avoid redundant explanations. In the drawings, the diagrams illustrating the circuit and device configurations are merely schematic representations. Design 1

[0009] Fig. Figure 1 is a diagram illustrating a schematic configuration of an electric vehicle 10 in an electric vehicle control system 1 according to an embodiment 1 of the present disclosure. Fig. In Figure 1, the electric vehicle 10 comprises a train consisting of three cars: car 21, car 22, and car 23. Although the description here uses three cars, the electric vehicle 10 could comprise one, two, four, or more cars. The electric vehicle control system 1 comprises power conversion devices 51 and 52 and a vehicle information management device 60. The power conversion devices 51 and 52 are electrically connected to a pantograph 80 via a circuit breaker 70. The vehicle information management device 60 can communicate with the power conversion devices 51 and 52. The vehicle information management device 60 can also communicate with the circuit breaker 70. The power conversion devices 51 and 52, the vehicle information management device 60, the circuit breaker 70, and the pantograph 80 could be located in each of the cars 21, 22, and 23. Fig. Car 21 is equipped with the vehicle information management device 60, the circuit breaker 70, and the pantograph 80. Car 22 is equipped with the power conversion device 51. Car 23 is equipped with the power conversion device 52.

[0010] The power conversion devices 51 and 52 are electrically connected to the current collector 80 and the circuit breaker 70 and receive power from the power source 90. The power conversion devices 51 and 52 convert the power supplied by the power source 90 into DC power or AC power and supply the converted power to a load (not illustrated). Here, the load is, for example, an electric motor. Details of the circuit configuration are described later. The power conversion devices 51 and 52 can communicate with or exchange information with the vehicle information management device 60 via an internal vehicle transmission line 61. The power conversion devices 51 and 52 are control devices that control the operation of the electric vehicle 10.

[0011] The vehicle information management device 60 can communicate with the power conversion devices 51 and 52 via an in-vehicle transmission line 61. The vehicle information management device 60 is connected to a driver's cab (not illustrated) and receives power running commands and brake commands from the driver's cab. The vehicle information management device 60 controls the driving and braking of the electric vehicle 10 by transmitting the received power running commands to the power conversion devices 51 and 52 and to a brake control device (not illustrated). The vehicle information management device 60 can also exchange information with the circuit breaker 70.If it is necessary to open the circuit breaker 70, the vehicle information management device 60 sends an initial signal to the power conversion devices 51 and 52. Details will be described later.

[0012] Circuit breaker 70 is electrically connected in series between the pantograph 80 and the power conversion device 51. Circuit breaker 70 opens, for example, when it is necessary to stop or halt the power supply to the electric vehicle 10, such as in the event of a fault in the power conversion device 51. When circuit breaker 70 is open, the pantograph 80 and the power conversion device 51 are electrically disconnected, thus halting the power supply from the pantograph 80 to the power conversion device 51. When power needs to be supplied to the electric vehicle 10, circuit breaker 70 closes. Closing circuit breaker 70 electrically connects the pantograph 80 and the power conversion device 51, allowing power to be supplied from the pantograph 80 to the power conversion device 51.Although the description here uses the power conversion device 51 as an example, the same applies to the power conversion device 52.

[0013] The current collector 80 receives DC power from a substation (not illustrated) via the power source 90 and supplies power to the power conversion devices 51 and 52. The current collector 80 is, for example, a pantograph receiving power from overhead lines or a contact shoe receiving power from a third rail.

[0014] Power source 90 is connected to the substation and receives DC power from the substation. Power source 90 is, for example, an overhead line or a third rail.

[0015] Fig. Figure 2 is a schematic diagram illustrating a configuration of the electric vehicle control system 1 according to embodiment 1 of the present disclosure. Fig. 2 A first electric vehicle control device comprises the circuit breaker 70, a first contactor 71, a second contactor 72, a resistor 73, a filter choke 74, a filter capacitor 75, and the power conversion device 51. A second electric vehicle control device comprises the circuit breaker 70, the first contactor 71, the second contactor 72, the resistor 73, the filter choke 74, the filter capacitor 75, and the power conversion device 52. The first and second electric vehicle control devices share the circuit breaker 10.

[0016] In the first electric vehicle control device, one end of the circuit breaker 70 is connected to the pantograph 80. The other end of the circuit breaker 70 is connected to the first contactor 71 and the second contactor 72. One end of the first contactor 71 is connected to the circuit breaker 70. The other end of the first contactor 71 is connected to the resistor 73. One end of the second contactor 72 is connected to the circuit breaker 70. The other end of the second contactor 72 is connected to the resistor 73 and the filter choke 74. One end of the resistor 73 is connected to the first contactor 71. The other end of the resistor 73 is connected to the second contactor 72 and the filter choke 74. One end of the filter choke 74 is connected to the second contactor 72 and the resistor 73. The other end of the filter choke 74 is connected to one end of the filter capacitor 75 and an input terminal of the power conversion device 51.One end of the filter capacitor 75 is connected to the filter choke 74 and the power conversion device 51. The other end of the filter capacitor 75 is grounded. One end of the power conversion device 51 is connected to the filter choke 74 and the filter capacitor 75. The power conversion device 51 is connected in parallel to the filter capacitor 75. The other end of the power conversion device 51 is connected to an electric motor 76, which serves as the load. The electric motor 76 could, for example, be an induction motor, a synchronous motor, or a synchronous reluctance motor.

[0017] In the second electric vehicle control device, one end of the circuit breaker 70 is connected to the pantograph 80. The other end of the circuit breaker 70 is connected to the first contactor 71 and the second contactor 72. One end of the first contactor 71 is connected to the circuit breaker 70. The other end of the first contactor 71 is connected to the resistor 73. One end of the second contactor 72 is connected to the circuit breaker 70. The other end of the second contactor 72 is connected to the resistor 73 and the filter choke 74. One end of the resistor 73 is connected to the first contactor 71. The other end of the resistor 73 is connected to the second contactor 72 and the filter choke 74. One end of the filter choke 74 is connected to the second contactor 72 and the resistor 73. The other end of the filter choke 74 is connected to one end of the filter capacitor 75 and the input terminal of the power conversion device 52.One end of the filter capacitor 75 is connected to the filter choke 74 and the power conversion device 52. The other end of the filter capacitor 75 is grounded. One end of the power conversion device 52 is connected to the filter choke 74 and the filter capacitor 75. The power conversion device 52 is connected in parallel to the filter capacitor 75. Another end of the power conversion device 52 is connected to an electric motor 76, which serves as the load. The electric motor 76 could be, for example, an induction motor, a synchronous motor, or a synchronous reluctance motor. Since the power conversion devices 51 and 52 have the same functions, the description uses the power conversion device 51 as an example.

[0018] The first contactor 71 and the second contactor 72 are contactors that electrically connect both ends when closed and electrically disconnect the ends when open. The resistor 73 is a charging resistor to prevent inrush current when the filter capacitor 75 is charged. The filter choke 74 and the filter capacitor 75 form an LC filter circuit and are designed to suppress harmonics, or overtones, generated when the power conversion device 51 performs power conversion. Furthermore, the filter choke 74 smooths the current flowing from the power source 90 to the power conversion device 51, and the filter capacitor 75 smooths the voltage on the DC side of the power conversion device 51.The power conversion device 51 converts the DC power supplied by the power source 90 into AC power and supplies the converted AC power to the electric motor 76.

[0019] To supply power to the power conversion device 51, the circuit breaker 70 and the first contactor 71 are closed. During this stage, the second contactor 72 remains open. Closing the circuit breaker 70 and the first contactor 71 electrically connects the current collector 80, the circuit breaker 70, the first contactor 71, the resistor 73, the filter choke 74, and the filter capacitor 75, and then charges the filter capacitor 75. When the filter capacitor 75 is charged with a predetermined amount of energy, the first contactor 71 opens and the second contactor 72 closes. Opening the first contactor 71 and closing the second contactor 72 causes the current collector 80, the circuit breaker 70, the second contactor 72, the filter choke 74 and the filter capacitor 75 to be electrically connected and the filter capacitor 75 to be charged.Charging the filter capacitor 75 via the first contactor 71 and the resistor 73 suppresses an inrush current to the filter capacitor 75. To prevent an inrush current from flowing during the charging of the filter capacitor 75, the first and second contactors 71 and 72 are switched to the closed position. Once the filter capacitor 75 is charged, the power conversion device 51 begins operation. The power conversion device 51 is, for example, a two-stage three-phase inverter circuit or a three-stage three-phase inverter circuit. Since power conversion operation is a general process, its description is omitted.

[0020] Fig. Figure 3 presents a schematic diagram illustrating the power conversion device in the electric vehicle control system 1 according to embodiment 1 of the present disclosure. The description uses the power conversion device 51 as an example. The power conversion device 51 comprises a driver 501, a converter 502, a fault detector 503, an input / output device 504, a processing unit 505, a circuit breaker control device 506, and a memory 507.

[0021] The driver 501 controls switching elements that are encompassed by the converter 502. More specifically, this means that the driver 501 generates signals to control the gates of the switching elements, which are formed from transistors.

[0022] The converter 502 comprises switching elements that form part of a two-stage, three-phase inverter circuit. The switching elements consist of a positive-side arm and a negative-side arm connected in series, referred to as a string and leg, respectively. The converter 502 forms strings in the U-phase, V-phase, and W-phase to convert DC power into AC power. The converter 502 supplies the converted AC power to the electric motor 76.

[0023] The fault detector 503 detects faults in the power conversion device 51. Such faults could, for example, include an overcurrent caused by a short circuit in the power conversion device 51.

[0024] The input / output device 504 is connected to the vehicle information management device 60 and receives operating commands, fault information, and the like. When the circuit breaker 70 of the electric vehicle 10 is open, the input / output device 504 also receives an initial signal from the vehicle information management device 60 indicating that the circuit breaker 70 should be opened. When the fault detector 503 detects a fault, the input / output device 504 notifies the vehicle information management device 60 of the fault.

[0025] The processing unit 505 is connected to the input / output device 504 and receives an operating command, error information, and the like, sent by the vehicle information management device 60. Based on the received operating command, the processing unit 505 controls the driver 501.

[0026] When the fault detector 503 detects a fault, the processing unit 505 notifies the vehicle information management device 60 of the fault via the input / output device 506. When the fault detector 503 detects a fault, the processing unit 505 also sends a signal to the circuit breaker control unit 506 to open the circuit breaker 70.

[0027] When the processing unit 505 receives the signal to open the circuit breaker 70, the circuit breaker control unit 506 performs a control operation to open the circuit breaker 70. The power conversion device, which includes the circuit breaker control unit 506, can ensure reliable opening of the circuit breaker 70 in the event of a fault in the power conversion device.

[0028] Memory 507 is a memory that records errors. More specifically, this means that when the error detector 503 detects an error, the processing unit 505 records the occurrence of the error in memory 507. The cause of the error could also be recorded.

[0029] When the processing unit 505 receives an initial signal indicating that the unopened circuit breaker 70 should be opened, the processing unit 505 performs a control action to suspend fault recording for memory 507 for a predetermined duration. The predetermined duration refers to the time until a signal indicating that circuit breaker 70 is opened is received, or a preset time stored in memory 507. For example, the preset time stored in memory 507 is 1-2 seconds. After the predetermined duration has elapsed, the processing unit 505 clears the suspension of fault recording for memory 507. Here, "suspending fault recording" means not recording faults.

[0030] The operating mode of the electric vehicle control system 1 according to embodiment 1 of the present disclosure is described below. Fig. Figure 4 represents a flowchart illustrating an example of operating modes of the vehicle information management device 60, the power conversion devices 51 and 52 and the circuit breaker 70 from the occurrence of a fault in the power conversion device 51 to the opening of the circuit breaker in the electric vehicle control system 1 according to embodiment 1 of the present disclosure. Fig. Figure 5 shows a flowchart illustrating an example of the operating modes of the vehicle information management device 60, the power conversion devices 51 and 52 and the circuit breaker 70 after the circuit breaker 70 has been opened.

[0031] A fault, such as an overcurrent, occurs in the power conversion device 51 (S101). The power conversion device 51 notifies the vehicle information management device 60 of the fault (S102). The vehicle information management device 60 receives a signal from the power conversion device 51 indicating the fault (S103). The power conversion device 51 records the fault in memory 507 (S104). After receiving the signal indicating the fault, the vehicle information management device 60 generates an initial signal indicating that the circuit breaker 70 should be opened (S105).The vehicle information management device 60 sends the first signal to the power conversion devices 51 and 52 (S106). The power conversion devices 51 and 52 receive the first signal from the vehicle information management device 60 (S107, S108). When the first signal is received from the vehicle information management device 60, the power conversion device 52 stops a fault recording in the memory 507 of the power conversion device 52 (S109). The circuit breaker control unit 506 of the power conversion device 51 detects the occurrence of the fault and controls the opening of the circuit breaker 70 (S110), and the circuit breaker 70 is opened (S111). Fig. 4. The power conversion device 51 does not stop the fault recording after the first signal is received. Here, the vehicle information management device 60 sends the first signal to both the power conversion device 51 and the power conversion device 52. However, the vehicle information management device 60 could also send the first signal only to the power conversion device 52, in which no fault occurs, without sending the first signal to the power conversion device 51, in which the fault occurred.

[0032] In Fig. Power conversion device 51 sends a circuit breaker opening termination signal to the vehicle information management device 60, indicating that the opening of circuit breaker 70 is complete (S112). The vehicle information management device 60 receives the circuit breaker opening termination signal from circuit breaker 70 (S114) and generates a second signal indicating that the circuit breaker is open (S115). The vehicle information management device 60 sends the second signal to power conversion devices 51 and 52 (S116). Power conversion devices 51 and 52 receive the second signal from the vehicle information management device 60 (S117, S118). When the second signal is received from the vehicle information management device 60, the power conversion device 52 resumes fault recording for the memory 507 of the power conversion device 52 (S119).Here, the duration during which the power conversion device 52 stops recording the fault is the time from the reception of the first signal by the power conversion device 52 until the reception of the second signal by the power conversion device.

[0033] As described above, when it is necessary to open the circuit breaker 70 to disconnect the power conversion devices 51 and 52 from the power source, the vehicle information management device 60 in the electric vehicle control system 1 sends the first signal to the power conversion devices 51 and 52 before the circuit breaker 70 opens. The power conversion devices 51 and 52, having received the first signal, stop recording faults. By stopping fault recording when the circuit breaker 70 is open, the power conversion devices in which no fault occurs do not record faults, thus reducing vehicle inspection time.By suspending fault recording when circuit breaker 70 is open, the power conversion devices 51 and 52 prevent faults in which no fault occurs from being recorded, thus ensuring adequate fault recording capacity through normal detection. Furthermore, suspending fault recording when circuit breaker 70 suppresses the generation of alarms or similar issues due to faulty fault detection.

[0034] The electric vehicle control system 1 according to embodiment 1 comprises: a power conversion device installed in an electric vehicle and electrically connected in series with a circuit breaker electrically connected to a power source, wherein the power conversion device is configured to convert power supplied by the power source into DC power or AC power and to record a fault in response to the opening of the circuit breaker or to the cessation of a power supply from a control power source of the electric vehicle; and a vehicle information management device installed in the electric vehicle and communicatively connected to the power conversion device.In the event of disconnection of the power conversion device from the power source by opening the circuit breaker, the vehicle information management device sends a first signal to the power conversion device before the circuit breaker is opened, wherein the vehicle information management device sends the first signal to the power conversion device before a power supply from the control power source of the electric vehicle is stopped, and wherein the power conversion device that has received the first signal sent by the vehicle information management device holds a fault recording for a predetermined duration, thereby reducing the time required for vehicle inspections.

[0035] In the electric vehicle control system 1 according to embodiment 1, the power conversion device comprises a circuit breaker control device that closes the circuit breaker to electrically connect the power conversion device to the power source, or that opens the circuit breaker to electrically disconnect the power conversion device from the power source, thereby ensuring reliable opening of the circuit breaker 70 in the event of a fault in the power conversion device.

[0036] The electric vehicle control system 1 according to embodiment 1 comprises a plurality of power conversion devices, wherein the vehicle information management device generates the first signal when a fault signal is received from one of the plurality of power conversion devices and sends the first signal to the plurality of power conversion devices before the circuit breaker is opened, and of the plurality of power conversion devices that have received the first signal sent by the vehicle information management device, a first power conversion device in which a fault occurs records a fault, and a second power conversion device in which no fault occurs does not record a fault, and thus a fault is not recorded in the power conversion device in which a fault does not occur, thereby reducing the time required for vehicle inspections. Design 2

[0037] In embodiment 2, an example is described in which the circuit breaker 70 is opened by switching off a control power source of the electric vehicle 10. Switching off the control power source means stopping the power supply required for control devices installed in the electric vehicle 10. In other words, switching off the control power source means stopping the power supply from the control power source required to control the devices installed in the electric vehicle 10. When the power supply from the control power source of the electric vehicle 10 is stopped, the power supply to the circuit breaker control device 506 of the power conversion device 51 is also stopped.The circuit breaker control device 506 performs controls to keep the circuit breaker 70 closed by supplying current to a circuit that keeps the circuit breaker 70 closed, and to open the circuit breaker 70 by interrupting or stopping the power supply to the circuit that keeps the circuit breaker 70 closed. In embodiment 2, the power supply to the circuit breaker control device 506 is interrupted to switch off the control power source that interrupts the power supply to the circuit that keeps the circuit breaker 70 closed, thereby causing the circuit breaker 70 to open. The functions described in embodiment 1... Fig. 1, Fig. 2 to Fig. 3 apply similarly to embodiment 2, and therefore the description of a configuration of the figures is omitted here.

[0038] The operating mode of the electric vehicle control system 2 according to embodiment 2 of the present disclosure is described below. Fig. Figure 6 illustrates a flowchart of an example of operating modes of the vehicle information management device 60, the power conversion device 51 and the circuit breaker 70 from switching off the control power source to opening the circuit breaker in an electric vehicle control system 2 according to embodiment 2 of the present disclosure.

[0039] The vehicle information management device 60 receives a signal to switch off the control power source of the electric vehicle 10 (S201). The vehicle information management device 60 generates an initial signal indicating that the circuit breaker 70 is to be opened (S202). The vehicle information management device 60 sends the initial signal to the power conversion device 51 (S203). The power conversion device 51 receives the initial signal sent by the vehicle information management device 60 (S204). Upon receiving the initial signal sent by the vehicle information management device 60, the power conversion device 51 stops an error recording in the memory 507 of the power conversion device 51 (S205).Upon receiving the first signal transmitted by the vehicle information management device 60, the power conversion device 51 stops the power supply to the circuit breaker control unit 506 and controls the opening of the circuit breaker 70 (S206), and the circuit breaker 70 opens (S207). Although the power conversion device 51 controls the opening of the circuit breaker 70 after receiving the first signal, the power conversion device 51 could alternatively control the opening of the circuit breaker 70 before receiving the first signal.

[0040] The electric vehicle control system 2 according to embodiment 2 comprises a power conversion device installed in an electric vehicle and is electrically connected in series with a circuit breaker which is electrically connected to a power source, wherein the power conversion device is configured to convert power supplied by the power source into DC power or AC power and to record a fault in response to the opening of the circuit breaker or to the cessation of a power supply from a control power source of the electric vehicle; and a vehicle information management device which is installed in the electric vehicle and which is communicatively connected to the power conversion device.In the event of a power supply being stopped from the electric vehicle's control power source, the vehicle information management device sends the first signal to the power conversion device before the power supply from the electric vehicle's control power source is stopped, and the power conversion device that has received the first signal sent by the vehicle information management device suspends fault recording for a predetermined duration, thus preventing a fault from being recorded in the power conversion device and reducing the time required for vehicle inspections.

[0041] The power conversion devices 51 and 52 and the vehicle information management device 60 comprise at least a processor, a memory, a receiver, and a transmitter. The operation of each device can be implemented by software. Fig. Figure 7 presents a diagram illustrating a general configuration example of hardware implementing electric vehicle control systems 1 and 2. The in Fig.The illustrated device comprises a processor 1001, a memory 1002, a receiver 1003, and a transmitter 1004. The processor 1001 performs calculations and controls, through software, the use of received data. The memory 1002 stores received data and data required for the calculations and controls performed by the processor 1001, and also stores software. The receiver 1003 is an interface that receives signals or information input to the power conversion devices 51 and 52 and the vehicle information management device 60. The transmitter 1004 is an interface that sends signals or information output from the power conversion devices 51 and 52 and the vehicle information management device 60.A large number of processors 1001, a large number of memories 1002, a large number of receivers 1003 and a large number of transmitters 1004 could be provided.

[0042] The description above describes an example of a power source that provides DC power, although the power source could also supply AC power. In a case where the power source supplies AC power, a transformer is provided downstream of the current collector 80 to step down the received AC voltage, and a converter is provided downstream of the transformer to convert the AC voltage output by the transformer into a DC voltage.

[0043] In the description above, the power conversion devices 51 and 52 are used as examples, but a similar control can be applied to auxiliary power supply devices that share the circuit breaker 70. Reference symbol list 10 electric vehicles Cars 21, 22, 23 51, 52 Power conversion device 60 Vehicle Information Management Device 61 vehicle-internal transmission line 70 circuit breakers 71 first shooter 72 second shooter 73 Resistance 74 Filter throttle 75 Filter capacitor 76 Electric motor 80 current collectors 90 Power source 501 Driver 502 converters 503 Fault Detector 504 Input / Output Device 505 processing unit 506 Circuit breaker control unit 507 storage 1001 processor 1002 storage locations 1003 recipients 1004 transmitters QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2018-191487

[0003]

Claims

[1] Electric vehicle control system which features: a power conversion device installed in an electric vehicle and electrically connected in series with a circuit breaker which is electrically connected to a power source, wherein the power conversion device is configured to convert power supplied by the power source into direct current (DC) power or alternating current (AC) power and to record a fault in response to the opening of the circuit breaker or to the cessation of a power supply from a control power source of the electric vehicle; and a vehicle information management device installed in the electric vehicle and communicatively connected to the power conversion device, wherein In the event of the power conversion device being disconnected from the power source by opening the circuit breaker, the vehicle information management device sends an initial signal to the power conversion device before the circuit breaker is opened, or in the event of a power supply being stopped from the control power source of the electric vehicle, the vehicle information management device transmits the initial signal to the power conversion device before a power supply from the control power source of the electric vehicle is stopped, and The power conversion device, which has received the first signal sent by the vehicle information management device, maintains an error recording for a predetermined duration. [2] Electric vehicle control system according to claim 1, wherein the power conversion device comprises a circuit breaker control device which closes the circuit breaker to connect the power conversion device electrically to the power source or which opens the circuit breaker to disconnect the power conversion device electrically from the power source. [3] Electric vehicle control system according to claim 1 or 2, wherein the power conversion device comprises a multitude of power conversion devices, The vehicle information management device generates the first signal when a fault signal is received from one of the plurality of power conversion devices, and sends the first signal to the plurality of power conversion devices before the circuit breaker is opened, and From the multitude of power conversion devices, a first power conversion device in which a fault occurs records a fault, and a second power conversion device in which no fault occurs records no fault.

Images