Overhead vehicle

Abstract

To electrically separate an installation device from a vehicle when necessary with a simple configuration.SOLUTION: In an installation vehicle 10, a first relay 22 is provided on an electric vehicle 12 side of a power supply line 20 connecting a battery 14 mounted on the electric vehicle 12 and a power load (an inverter 34 and a motor 36) provided in an electric installation device 30 installed on the electric vehicle 12. A second relay 32 is provided on the power supply line 20 on the side of the electrically powered mounting device 30. An installation ECU38 provided in the electric installation device 30 turns on / off the second relay 32 according to the operation of an operation switch 40 of the electric installation device 30, and a control ECU24 provided in the electric vehicle 12 turns off the first relay 22 when the electric installation device 30 is to be electrically disconnected from the electric vehicle 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a vehicle body. [Background technology]

[0002] Patent Document 1 describes a mounting device mounted on a vehicle that includes a vehicle battery and vehicle electrical equipment driven by the output voltage of the vehicle battery. The mounting device controls the output of the power supply unit for the mounted object so that the output voltage of the power supply unit for the mounted object is applied to the vehicle electrical equipment when the vehicle is stopped. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-66353 Summary of the Invention [Problem to be solved by the invention]

[0004] In a mounted vehicle, if the vehicle's power switch (ignition switch) is turned on or off while the mounting device is in operation, and the vehicle's battery is connected to or disconnected from the power supply circuit, the resulting electromotive force or back electromotive force may damage the mounting device. To prevent damage to the mounting device, a relay may be provided to turn the power supply on and off on the mounting device side, and when the vehicle's power switch is turned on or off, the vehicle's control unit communicates with the mounting device's control unit to turn off the relay. However, this would complicate the interface between the vehicle's control unit and the mounting device's control unit, increasing the cost of program development. Another problem is that if a malfunction occurs on the mounting device side, the vehicle's power switch cannot be turned on, making it impossible to move the vehicle.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a mounted vehicle that can achieve, with a simple configuration, electrically disconnecting a mounting device from the vehicle when necessary. [Means for solving the problem]

[0006] The mounted vehicle of the first aspect includes a first switching unit provided on the vehicle side of a power supply circuit that connects a battery mounted on the vehicle and an electric power load provided on a mounting device mounted on the vehicle, a second switching unit provided on the mounting device side of the power supply circuit, a mounting device side control unit provided on the mounting device that turns the second switching unit on and off in response to operation of a switch on the mounting device, and a vehicle side control unit provided on the vehicle that turns off the first switching unit when the mounting device should be electrically disconnected from the vehicle.

[0007] In a first aspect, a power supply circuit connecting a battery mounted on a vehicle and an electric load provided in a mounting device mounted on the vehicle includes a first switching unit on the vehicle side and a second switching unit on the mounting device side of the power supply circuit, and a mounting device-side control unit turns the second switching unit on and off in response to operation of a switch on the mounting device, and a vehicle-side control unit turns the first switching unit off when the mounting device should be electrically disconnected from the vehicle.

[0008] As a result, the mounting device can be electrically disconnected from the vehicle by turning off the first switching unit when necessary, eliminating the need for the vehicle-side control unit to communicate with the mounting device-side control unit to control the turning off of the second switching unit in order to electrically disconnect the mounting device from the vehicle. This simplifies the interface between the control units, making it possible to achieve electrically disconnecting the mounting device from the vehicle when necessary with a simple configuration, and reducing the development costs of programs to be installed in each control unit.

[0009] In a second aspect, in the first aspect, the case where the mounting device should be electrically disconnected from the vehicle is when a power switch of the vehicle is turned on or off.

[0010] In the second aspect, when the vehicle's power switch is turned on or off, the first switching unit is turned off to electrically disconnect the mounting device from the vehicle, thereby preventing damage to the mounting device when the vehicle's power switch is turned on or off.

[0011] In the third aspect, in the first aspect, the case where the mounting device should be electrically disconnected from the vehicle is when the vehicle-side control unit detects a malfunction of the mounting device through communication with the mounting device-side control unit.

[0012] In the third aspect, when a failure of the mounting device is detected, the first switching unit is turned off to electrically disconnect the mounting device from the vehicle, so that even if a failure occurs in the mounting device, it is possible to turn on the vehicle's power switch and run the vehicle. [Effects of the Invention]

[0013] The present disclosure has an effect of enabling a mounting device to be electrically disconnected from a vehicle when necessary with a simple configuration. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic configuration diagram of a mounted vehicle according to an embodiment; [Figure 2] 6 is a flowchart showing a first relay control process executed by a control ECU. [Figure 3] FIG. 2 is a schematic diagram of a mounted vehicle according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0015] An example of an embodiment of the present disclosure will be described in detail below with reference to the drawings. FIG. 1 shows a mounted vehicle 10 according to this embodiment. The mounted vehicle 10 is configured by mounting an electric mounted device 30 on an electric vehicle 12. Note that FIG. 1 shows the appearance of a garbage collection and compaction device that causes the mounted vehicle 10 to function as a garbage compactor as an example of the electric mounted device 30, but the electric mounted device 30 is not limited to this. The mounted vehicle 10 is an example of a mounted vehicle according to the present disclosure, the electric vehicle 12 is an example of a vehicle in the present disclosure, and the electric mounted device 30 is an example of a mounted device in the present disclosure.

[0016] The electric vehicle 12 is equipped with a battery 14 and an electric system 16 including a traction motor, a power control unit (PCU), etc. The battery 14 is a high-voltage battery with a higher voltage than an auxiliary battery (not shown) installed in the electric vehicle 12. The battery 14 and the electric system 16 are connected via a junction connector 18, and when the electric vehicle 12 is traveling, the electric power stored in the battery 14 is supplied to the electric system 16 to drive the traction motor. A main relay (not shown) is provided between the battery 14 and the junction connector 18.

[0017] One end of a power line 20 is connected to the junction connector 18, and the other end of the power line 20 is connected to a motor 36 via an inverter 34 of the electric mounting device 30. The power line 20 is an example of a power circuit in the present disclosure, and the inverter 34 and motor 36 of the electric mounting device 30 are an example of a power load of the electric mounting device 30.

[0018] For example, if the electric mounted device 30 is a garbage collection and compaction device, the motor 36 generates driving force for transporting and compressing the input garbage into a cargo box using power supplied from the battery 14 of the electric vehicle 12 via the power line 20. The inverter 34 is connected to a mounted ECU (Electronic Control Unit) 38, and the operation of the inverter 34 and the motor 36 is controlled by the mounted ECU 38.

[0019] A first relay 22 is provided on the electric vehicle 12 side in the power supply line 20, and a second relay 32 is provided on the electric body mounting device 30 side. The second relay 32 is connected to a body mounting ECU 38. An operation switch 40 for turning the power supply to the electric body mounting device 30 on and off is connected to the body mounting ECU 38. The body mounting ECU 38 turns the second relay 32 on and off in response to operation of the operation switch 40. The second relay 32 is an example of a second switching unit in the present disclosure, and the body mounting ECU 38 is an example of a body mounting device-side control unit in the present disclosure.

[0020] The mounting ECU 38 is connected to a communication ECU 26 provided in the electric vehicle 12 via a communication line 28. The communication ECU 26 is connected to a control ECU 24 also provided in the electric vehicle 12, and the mounting ECU 38 and the control ECU 24 can communicate with each other via the communication line 28 and the communication ECU 26.

[0021] The control ECU 24 is connected to the first relay 22. The control ECU 24 turns off the first relay 22 when the electric mounting device 30 should be electrically disconnected from the electric vehicle 12. The electric mounting device 30 should be electrically disconnected from the electric vehicle 12 when a power switch (ignition switch) (not shown) of the electric vehicle 12 is turned on or off. The electric mounting device 30 should also be electrically disconnected from the electric vehicle 12 when a failure of the electric mounting device 30 is detected through communication with the mounting ECU 38. In this way, the control ECU 24 is an example of a vehicle-side control unit in the present disclosure, and the first relay 22 is an example of a first switching unit in the present disclosure.

[0022] Next, the operation of this embodiment will be described. Fig. 3 shows, as a comparative example of the present disclosure, a configuration in which the first relay 22 is omitted from the mounted vehicle 10 according to this embodiment.

[0023] When the power switch of the electric vehicle 12 is turned on, each power load (e.g., the inverter 34, the motor 36, etc.) connected to the battery 14 must be electrically disconnected from the battery 14 to prevent the loads from being damaged by electromotive force. Also, when the power switch of the electric vehicle 12 is turned off, each power load must be electrically disconnected from the battery 14 to prevent the loads from being damaged by counter electromotive force.

[0024] In the configuration of the comparative example shown in Figure 3, in order to electrically disconnect the inverter 34 and motor 36 on the electric mounting device 30 side from the battery 14, the control ECU 24 and the mounting ECU 38 must work together to perform the following communication and control. (1) The control ECU 24 sends a command to the bodywork ECU 38 to turn off the second relay 32. (2) The body ECU 38 turns off the second relay 32. (3) The bodywork ECU 38 notifies the control ECU 24 that the second relay 32 has been turned off. (4) The control ECU 24 switches the power supply of the electric vehicle 12 on or off.

[0025] In order to make the control ECU 24 and the mounting ECU 38 cooperate as described above, the development of the electric vehicle 12 and the development of the electric mounting device 30 must be carried out in cooperation with each other when developing the mounted vehicle 10. Therefore, the configuration of the comparative example shown in Fig. 3 has the problem that the development of the mounted vehicle 10 requires a lot of work and effort, which increases the development cost.

[0026] 3, if a failure occurs on the electrically powered mounting device 30 side and the control ECU 24 side is unable to turn off the second relay 32 via the mounting ECU 38, the power supply (main relay) of the electrically powered vehicle 12 cannot be turned on. This is because, depending on the state of the electrically powered mounting device 30 during the failure, the running of the electrically powered vehicle 12 may be adversely affected.

[0027] On the other hand, in the mounted vehicle 10 according to this embodiment, the control ECU 24 constantly performs the first relay control process shown in Fig. 2. In step 70 of the first relay control process, the control ECU 24 determines whether or not a command to power on the electric vehicle 12 has been issued by turning on the power switch of the electric vehicle 12. If the determination in step 70 is negative, the process proceeds to step 72. In step 72, the control ECU 24 determines whether or not a command to power off the electric vehicle 12 has been issued by turning off the power switch of the electric vehicle 12. If the determination in step 72 is negative, the process proceeds to step 74.

[0028] In step 74, the control ECU 24 communicates with the bodywork ECU 38 via the communication ECU 26, and determines whether a malfunction has occurred in the electric bodywork device 30 based on the results of the communication with the bodywork ECU 38. If normal communication with the bodywork ECU 38 has been achieved, the process returns to step 70. In this way, steps 70 to 74 are repeated while the determinations in all steps 70 to 74 are negative.

[0029] If the power switch of the electric vehicle 12 is turned on, the determination in step 70 is affirmative, and the process proceeds to step 76. In step 76, the control ECU 24 turns off the first relay 22 for a predetermined time, and while the first relay 22 is turned off, performs processing to turn on the power supply to the electric vehicle 12 (turns on the main relay to connect the battery 14 to the power supply line 20), and then returns to step 70. In this way, damage to the inverter 34 of the electric mounting device 30, etc., due to electromotive force generated when the power supply to the electric vehicle 12 is turned on, can be prevented by the simple processing of turning off the first relay 22 for a predetermined time.

[0030] Furthermore, if the power switch of the electric vehicle 12 is turned off, the determination in step 72 is affirmative, and the process proceeds to step 76. In step 76, the control ECU 24 turns off the first relay 22 for a predetermined time, and performs processing to turn off the power supply to the electric vehicle 12 while the first relay 22 is turned off (turning off the main relay to electrically disconnect the battery 14 from the power line 20). This makes it possible to suppress damage to the inverter 34 of the electric mounting device 30 and the like due to the back electromotive force generated when the power supply to the electric vehicle 12 is turned off, by the simple processing of turning off the first relay 22 for a predetermined time.

[0031] Furthermore, if communication with the mounting ECU 38 notifies the electric mounting device 30 that a failure has occurred, or if communication with the mounting ECU 38 is not possible, it can be determined that a failure such as a failure of the second relay 32, a system error, or a communication failure has occurred in the electric mounting device 30. In this case, the determination in step 74 is affirmative, and the process proceeds to step 78. In step 78, the control ECU 24 turns off the first relay 22 to electrically disconnect the electric mounting device 30 from the electric vehicle 12, and the process returns to step 70. This allows the electric vehicle 12 (mounted vehicle 10) to run on its own, even if a failure has occurred in the electric mounting device 30.

[0032] As described above, in the mounted vehicle 10 according to this embodiment, the first relay 22 is provided on the electric vehicle 12 side of the power line 20 that connects the battery 14 mounted on the electric vehicle 12 and the power load (the inverter 34 and the motor 36) provided in the electric mounting device 30 mounted on the electric vehicle 12. In addition, the second relay 32 is provided on the electric mounting device 30 side of the power line 20. The mounting ECU 38 provided in the electric mounting device 30 turns the second relay 32 on and off in response to operation of the operation switch 40 of the electric mounting device 30, and the control ECU 24 provided in the electric vehicle 12 turns the first relay 22 off when the electric mounting device 30 should be electrically disconnected from the electric vehicle 12. This makes it possible to electrically disconnect the electric mounting device 30 from the electric vehicle 12 when necessary with a simple configuration, thereby reducing development costs for programs to be installed in the control ECU 24 and the mounting ECU 38.

[0033] In this embodiment, the electrically powered mounting device 30 should be electrically disconnected from the electric vehicle 12 when the power switch of the electric vehicle 12 is turned on or off. This makes it possible to prevent the electrically powered mounting device 30 from being damaged when the power switch of the electric vehicle 12 is turned on or off.

[0034] In this embodiment, the electric mounting device 30 should be electrically disconnected from the electric vehicle 12 when the control ECU 24 detects a malfunction of the electric mounting device 30 through communication with the mounting ECU 38. This makes it possible to turn on the power switch of the electric vehicle 12 and run the mounted vehicle 10 even when a malfunction occurs in the electric mounting device 30.

[0035] In the above embodiment, the first relay 22 is used as the first switching unit, and the second relay 32 is used as the second switching unit. However, the present disclosure is not limited to this, and semiconductor switching elements or the like may be used as the first switching unit and the second switching unit. [Explanation of symbols]

[0036] 10. Bodywork vehicles 12 Electric vehicles (vehicles) 14 Battery 20 Power line (power circuit) 22 First relay (first switching section) 24 Control ECU (vehicle side control unit) 30 Electric mounting device (mounting device) 32 Second relay (second switching section) 34 Inverter (power load) 36 Motor (power load) 38 Bodywork ECU (bodywork device side control unit)

Claims

1. a first switching unit provided on the vehicle side of a power supply circuit that connects a battery mounted on a vehicle and an electric load provided in an attachment device mounted on the vehicle; A second switching unit provided on the mounting device side of the power supply circuit; A mounting device side control unit provided in the mounting device and turning on and off the second switching unit in response to operation of a switch of the mounting device; a vehicle-side control unit provided in the vehicle and configured to turn off the first switching unit when the mounting device is to be electrically disconnected from the vehicle; Bodywork vehicles including.

2. 2. The mounted vehicle according to claim 1, wherein the mounted device is to be electrically disconnected from the vehicle when a power switch of the vehicle is turned on or off.

3. 2. The mounted vehicle according to claim 1, wherein the mounted device should be electrically disconnected from the vehicle when the vehicle-side control unit detects a failure in the mounted device through communication with the mounted device-side control unit.

Images