JP2020026244A - Electric work vehicle - Google Patents

Abstract

To provide an electric work vehicle which can output battery power of a vehicle to the outside while inhibiting cost increase.SOLUTION: An electric work vehicle includes: a vehicle body equipped with a battery which can be charged from the outside; an output port which is connected with an external cable to be able to output alternating-current power to the outside; an installation body installed at the vehicle body; a work part which performs predetermined work by the alternating-current power being supplied at the installation body; and an electric power conversion part which converts direct-current power output from the battery in the vehicle body into the alternating-current power and supplies the alternating-current power to the installation body or the output port.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric work vehicle.

  Generally, in a work vehicle such as a garbage vehicle, a refrigerated vehicle, a dump vehicle, a mixer vehicle, or a fire engine, the work vehicle is extracted by extracting at least a part of the rotational power of the internal combustion engine through a PTO (Power Take-Off) device. It is used as the operating power source for the hydraulic pumps and compressors of the mounted equipment. In recent years, as for the work vehicle, as disclosed in Japanese Patent Application Laid-Open No. H11-163, the development of an electric vehicle without an internal combustion engine has been studied from the viewpoint of reducing the environmental load. Such an electrified vehicle (electrically powered work vehicle) includes a device for supplying the electric power of the vehicle-side battery to the body mounting device instead of the PTO device. It is operated by the electric power supplied from the side battery.

JP 2012-232724 A

  The electric work vehicle is expected to be used as an emergency power source by enabling the battery power of the vehicle to be output to the outside in an emergency such as a disaster. Also, from the viewpoint of more efficient power use, it is also possible to support a V2X (Vehicle to Everything) power supply system between vehicles, between vehicles and external electronic devices, between vehicles and external facilities, or between vehicles and external infrastructure. Expected. However, when such a power supply system is added to a vehicle, it is necessary to add a configuration that enables the battery power of the vehicle to be output to the outside, so that the vehicle cost may increase.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide an electric work vehicle capable of outputting battery power of a vehicle to the outside while suppressing an increase in cost.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects.

  An electric work vehicle according to an aspect of the present invention includes a vehicle body on which a battery that can be charged from the outside is mounted, an output port capable of outputting AC power to the outside by connecting an external cable, and mounted on the vehicle body. The body, a working unit that performs a predetermined work by supplying AC power in the body, and converts DC power output from the battery to AC power in the vehicle body, the body or A power conversion unit for supplying the power to the output port.

  According to the above configuration, the electric work vehicle according to the aspect of the present invention uses the power conversion unit provided to convert the AC power supplied to the work unit installed on the body, and outputs the electric power to the outside. Has been supplied. In a conventional vehicle, in order to supply the power stored in the battery to the outside, it is necessary to newly install a configuration for supplying power to the outside, such as a discharge converter. The addition of a configuration for supplying electric power to the outside increases vehicle cost. On the other hand, the electric work vehicle according to this aspect supplies electric power to the outside using a power conversion unit provided to supply AC power to the work unit installed on the body. Thus, the electric work vehicle according to the present aspect can suppress an increase in vehicle cost. Thus, the electric work vehicle according to this aspect can output the electric power stored in the battery to the outside while suppressing an increase in cost.

It is a figure which shows the electric work vehicle which concerns on this embodiment, the electric power supply object which receives the electric power supply from the said electric work vehicle, and the charging equipment which supplies electric power to the said electric work vehicle. FIG. 2 is a block diagram showing an internal configuration of the electric work vehicle shown in FIG. 1.

  Hereinafter, an electric work vehicle according to an embodiment of the present invention will be described with reference to the drawings. Note that the present embodiment is not limited to the content described below, and can be arbitrarily changed and implemented without changing the gist thereof. Also, the drawings used in the description of the embodiments are all schematic diagrams of constituent members, and are partially emphasized, enlarged, reduced, or omitted for better understanding. May not accurately represent the shape or shape.

  FIG. 1 is a diagram illustrating an electric work vehicle 1 according to the present embodiment, a power supply target 2 that receives power supply from the electric work vehicle 1, and a charging facility 3 that supplies electric power to the electric work vehicle 1. . The electric work vehicle 1 according to the present embodiment includes a vehicle body 4 provided with wheels 5, a cab 6, and a body 7, and stores electric power stored in a battery 10 described later in an inlet 80 and an inlet 80 described later. The electric truck can be supplied to the power supply target 2 installed outside the electric work vehicle 1 via the external cable 8 or the external cable 9 connected thereto. Further, the electric work vehicle 1 according to the present embodiment can charge the battery 10 by the charging facility 3 connected via the inlet 80.

  The electric work vehicle 1 according to the present embodiment is assumed to be an electric vehicle including a motor 30 described later as a drive source for traveling, but may be a hybrid vehicle further including an engine. Further, the power supply target 2 in the present embodiment is a vehicle different from the own vehicle, an external facility such as a general residence, a building, or a factory, an external infrastructure such as a traffic light or a street light, or another external electronic device. is there. Further, the charging equipment 3 in the present embodiment may be a commercial equipment such as a charging station or a charging equipment installed in a building such as a general residence or a building.

  The vehicle body 4 is configured by, for example, a ladder frame having side rails (not shown) and a plurality of cross members. The cab 6 is a structure including a driver's seat (not shown), and is provided above a front portion of the vehicle body 4. The body 7 is a structure having a configuration necessary for performing a predetermined operation performed by the electric work vehicle 1, and is mounted above a rear part of the vehicle body 4. Here, the electric work vehicle 1 according to the present embodiment is, for example, a garbage vehicle, a refrigerated vehicle, a dump vehicle, a mixer vehicle, a fire vehicle, or the like. That is, the body 7 is appropriately changed according to the type of the electric work vehicle 1.

  Here, an internal configuration of the electric work vehicle 1 according to the present embodiment will be described with reference to FIG. In the following embodiments, the electric work vehicle 1 will be simply referred to as a vehicle 1 for convenience of description.

  FIG. 2 is a block diagram showing an internal configuration of the vehicle 1 shown in FIG. As shown in FIG. 2, the vehicle 1 includes a battery 10, a power distribution unit (PDU) 20, a motor 30, a speed reduction mechanism 40, a differential mechanism 50, a drive shaft 60, a driving inverter 70, an inlet 80, a relay switch 90, and a charging device. Converter 100, a working unit 110, a bodywork inverter (power conversion unit) 120, and an ECU 130.

  The battery 10 is mounted on the vehicle body 4 and accumulates electric power for running the vehicle 1 or supplying power to each component included in the vehicle 1. For example, the battery 10 is a secondary battery that supplies power to a motor 30 described below and components included in the vehicle 1 via a power distribution unit (PDU) 20. The battery 10 includes a plurality of relatively large-capacity battery modules (not shown) therein for storing electric power required for the vehicle 1.

  The motor 30 is supplied with AC power from the driving inverter 70 to generate a driving force necessary for the vehicle 1 to travel. The reduction mechanism 40 includes a plurality of gears (not shown), and reduces the rotational torque input from the motor 30 and outputs the reduced rotation torque to the differential mechanism 50. The differential mechanism 50 distributes the power input from the speed reduction mechanism 40 to the wheels 5. The distributed power is transmitted to the wheels 5 via the drive shaft 60. Thereby, the vehicle 1 according to the present embodiment can run the vehicle 1 by rotating the wheels 5. The driving inverter 70 converts the DC power supplied from the battery 10 into AC power via the power distribution unit 20 and supplies the AC power to the motor 30, and converts the torque output from the motor 30 in response to the accelerator operation on the vehicle 1. Control.

  The inlet 80 is configured such that a connector (not shown) provided at one end of the external cable 8 shown in FIG. 1 can be connected. The inlet 80 in the present embodiment has, for example, a DC port 81 and an AC port 82.

  The DC port 81 is connected to the charging facility 3 for transmitting DC power via the DC external cable 8 and functions as an input port capable of inputting DC power supplied from the charging facility 3 for transmitting DC power. . For example, the external cable 8 is a cable connected to the charging facility 3 such as a rapid charging stand.

  The AC port 82 is connected, via an AC external cable 9, to the charging facility 3 that transmits power by AC or the power supply target 2 that can receive power by AC. When the AC port 82 is connected to the charging facility 3 that transmits AC power, the AC port 82 functions as an input port that can input AC power supplied from the charging facility 3 that transmits AC power. When the AC port 82 is connected to the power supply target 2 that can receive AC power, the AC port 82 functions as an output port that can output AC power to the power supply target 2. For example, the external cable 9 is a cable that can be connected to a charging facility 3 such as a normal charging station or a three-phase AC power supply of a power network of an external facility such as a factory.

  The relay switch 90 is connected between the AC port 82 and an AC-DC converter 102 of the charging converter 100 described later. The relay switch 90 in the present embodiment is, for example, a contact relay switch having components such as a coil and a mechanical switch, or a non-contact relay switch having electronic components such as a triac and a transistor. Specifically, the relay switch 90 includes one movable contact 91 and two fixed contacts 92 and 93. The movable contact 91 is connected to the AC port 82. Fixed contact 92 is connected to AC-DC converter 102. The fixed contact 93 is connected to a mounting inverter 120 described later. When the AC port 82 is connected to a charging facility that transmits AC power, the relay switch 90 according to the present embodiment makes the movable contact 91 and the fixed contact 92 contact. When the relay switch 90 is connected to the power supply target 2 that can receive AC power, the relay switch 90 contacts the movable contact 91 and the fixed contact 93.

  The charging converter 100 converts the electric power supplied from the charging facility 3 via the external cable 8 or the external cable 9 and the inlet 80 into electric power that can be stored in the battery 10. Further, charging converter 100 outputs the converted power to battery 10 via power distribution unit 20. The charging converter 100 according to the present embodiment includes, for example, a relay switch 101 and an AC-DC converter 102.

  Here, charging converter 100 is configured to be able to communicate with external charging facility 3. Thereby, desired charging power that can be stored in the battery 10 can be supplied to the charging facility 3.

  The relay switch 101 is configured to be able to connect and disconnect the power line on the inlet 80 side and the power line on the power distribution unit 20 side. Thereby, the relay switch 101 supplies the DC power supplied from the charging facility 3 that transmits DC power to the battery 10 via the external cable 8, the DC port 81 of the inlet 80, and the power distribution unit 20. Can be.

  The AC-DC converter 102 has a predetermined AC power that can be stored in the battery 10 via the external cable 9, the AC port 82 of the inlet 80, and the AC power supplied from the charging facility 3 that transmits AC power via the relay switch 90. Convert to DC power. Further, AC-DC converter 102 outputs the converted DC power to battery 10 via power distribution unit 20. Thereby, the vehicle 1 according to the present embodiment can charge the battery 10 by the charging facility 3.

  The work unit 110 is installed on the body 7 shown in FIG. 1, and performs a predetermined work by supplying AC power to the body 7. The working unit 110 in the present embodiment is appropriately changed according to the type of the vehicle 1 such as a garbage vehicle, a refrigerated vehicle, a dump vehicle, a mixer vehicle, a fire engine vehicle, or the like.

  The bodywork inverter (power conversion unit) 120 is installed on the vehicle body 4 and converts DC power output from the battery 10 to predetermined AC power via the power distribution unit 20. Further, the body inverter 120 converts the converted AC power into the body 7 or the power supply target 2 connected to the vehicle 1 via the relay switch 90, the AC port 82 of the inlet 80, and the external cable 9. Supply to

  For example, when supplying predetermined AC power to the work unit 110, the bodywork inverter 120 converts predetermined DC power from the battery 10 into AC power by controlling an internal switching element, and is provided on the body 7. Supplied to the working unit 110.

  Further, for example, when supplying predetermined AC power to the external power supply target 2, the bodywork inverter 120 converts predetermined DC power from the battery 10 into AC power by controlling the internal switching element, The power is supplied to the power supply target 2 via the relay switch 90 and the AC port 82.

  ECU 130 includes a predetermined processor as hardware resources. The ECU 130 integrally controls the components included in the vehicle 1. For example, when it is necessary to supply power to the work unit 110 of the body 7, the ECU 130 instructs the bodywork inverter 120 to supply power to the work unit 110. In addition, ECU 130 instructs power distribution unit 20 to connect an electric path between battery 10 and bodywork inverter 120. Thereby, the vehicle 1 according to the present embodiment can supply the electric power stored in the battery 10 to the working unit 110 installed in the body 7.

  In addition, when supplying the AC power converted by the mounting inverter 120 to the power supply target 2, the ECU 130 instructs the mounting inverter 120 to supply power to the external power supply target 2. Further, ECU 130 instructs power distribution unit 20 to connect an electric path between battery 10 and bodywork inverter 120. Further, the ECU 130 instructs the relay switch 90 to bring the movable contact 91 and the fixed contact 93 into contact. The ECU 130 also converts the DC power output from the battery 10 into predetermined AC power via the power distribution unit 20 to the bodywork inverter 120, and relays the relay switch 90, the AC port 82 of the inlet 80, and It is instructed to supply the converted AC power to the power supply target 2 via the external cable 9. Thus, the vehicle 1 according to the present embodiment can supply the power stored in the battery 10 to the power supply target 2 installed outside the vehicle 1.

(Summary)
As described above, the electric work vehicle 1 according to the present embodiment includes the vehicle body 4 on which the battery 10 that can be charged from the outside is mounted, and the inlet 80 that can output AC power to the outside when the external cable 9 is connected. A port (output port) 82, a body 7 mounted on the vehicle body 4, a work unit 110 that performs predetermined work by supplying AC power to the body 7, and an output from the battery 10 in the body 4. And a bodywork inverter (power conversion unit) 120 that converts the DC power into AC power and supplies the AC power to the body 7 or the AC port (output port) 82.

  According to the above configuration, the electric work vehicle 1 according to the present embodiment uses the bodywork inverter 120 and the relay switch 90 provided to supply AC power to the work part 110 installed on the body 7. Thus, power is supplied to the power supply target 2 outside the vehicle. In a conventional vehicle, in order to supply the power stored in the battery 10 to the power supply target 2 outside the vehicle, a configuration for supplying power to the power supply target 2 outside the vehicle such as a discharge converter is provided. It needs to be newly installed. By adding a configuration for supplying power to the power supply target 2 outside the vehicle, the vehicle cost increases.

  On the other hand, the electric work vehicle 1 according to the present embodiment uses the bodywork inverter 120 and the relay switch 90 provided to supply AC power to the work part 110 installed on the body 7, Power is supplied to the external power supply target 2. The relay switch 90 has a simpler configuration than the discharge converter and is inexpensive. Thereby, the electric work vehicle 1 according to the present embodiment can suppress an increase in vehicle cost due to the addition of the configuration.

  Thus, the electric work vehicle 1 according to the present embodiment can output the electric power stored in the battery 10 to the outside while suppressing an increase in cost.

  The term “predetermined processor” used in the above description means a dedicated or general-purpose processor such as a microcomputer, for example. Further, ECU 130 in the present embodiment may be realized by a single processor, or may be realized by a plurality of processors.

  Although the embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This new embodiment can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 Electric work vehicle 2 Power supply object 3 Charging equipment 4 Body 5 Wheel 6 Cab 7 Body 8 External cable 9 External cable 10 Battery 20 Power distribution unit (PDU)
Reference Signs List 30 motor 40 reduction mechanism 50 differential mechanism 60 drive shaft 70 drive inverter 80 inlet 81 DC port 82 AC port (output port)
Reference Signs List 90 relay switch 91 movable contact 92 fixed contact 93 fixed contact 100 charging converter 101 relay switch 102 AC-DC converter 110 work unit 120 bodywork inverter (power conversion unit)
130 ECU

Claims (1)

A body equipped with an externally chargeable battery,
An output port that can output AC power to the outside by connecting an external cable,
A body mounted on the vehicle body,
A working unit that performs a predetermined work by supplying AC power in the body,
An electric power conversion unit that converts DC power output from the battery into AC power in the vehicle body and supplies the AC power to the body or the output port.

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