Mobile power cart

Abstract

This invention provides a compact, mobile power supply vehicle that utilizes the drive battery installed in an electric vehicle, enabling the supply of high power at the discharge capacity of that drive battery. [Solution] A self-propelled electric vehicle and A connecting cable connected by two contacts to the path between the DC / AC inverter in the electric axle mounted on the electric vehicle and the contactor switch in the battery, and a connecting part having an end at the other end of the connecting cable that can be energized, The mobile power supply vehicle was configured to consist of the following:

Description

Technical Field

[0001] The present invention relates to a mobile power vehicle that is compact and enables power supply at a high dischargeable power possessed by a drive battery mounted on an electric vehicle, by using the drive battery mounted on the electric vehicle.

Background Art

[0002] As methods for an emergency charging system of an electric vehicle, technologies of a charging device (Patent Document 1: Nissan Motor Co., Ltd.) and a vehicle-to-vehicle charging and discharging device (Patent Document 2: ORIX Corporation) using charging and discharging technology between electric vehicles have been reported.

[0003] In the charging device of Patent Document 1, in order to be electrically connected to the drive battery of the vehicle on the power supply side, a charging port used for charging and a charging cable are connected, and a method of connecting to the drive battery is used. However, according to the connection method using this method, since an existing charging port is used, the discharge power is limited by the communication standard, and only a low power (10 kW) output can be taken out compared to the dischargeable power (for example, 50 kW or more) originally possessed by the drive battery itself. In addition, the device of Patent Document 2 itself is heavy, and there is a problem that it takes labor for the personnel who operate it.

[0004] Also, as similar technologies, technologies of a battery charging device for driving an electric vehicle combined with a generator and a rescue vehicle (Patent Document 3: Toyo Electric Manufacturing Co., Ltd.) and a technology related to a mobile power vehicle (Patent Document 4: H Corporation) have been reported. Regarding the above technologies, since power generation using an internal combustion engine is performed, there are problems such as being restricted to an open outdoor location for use and noise. In addition, since the constituent devices are enlarged, there is a problem that the operation related to mobile travel is not as easy as that of a passenger car.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2014-165940 (Nissan Motor Co., Ltd.) [Patent Document 2] Japanese Patent Publication No. 2024-135782 (Origin Co., Ltd.) [Patent Document 3] Japanese Patent Publication No. 2013-27194 (Toyo Densan Co., Ltd.) [Patent Document 4] Japanese Patent Publication No. 2023-83190 (Aichi Corporation) [Non-patent literature]

[0006] [Non-Patent Document 1] https: / / ev2.nissan.co.jp / BLOG / 434 / (Source of Figure 5(A)) [Non-Patent Document 2] https: / / www.nissan-global.com / JP / INNOVATION / TECHNOLOGY / ARCHIVE / E_POWERTRAIN / (Source of Figure 5(B)) [Non-Patent Document 3] https: / / www.aisin.com / jp / aithink / innovation / blog / 005809.html (e-Akurusu) [Non-Patent Document 4] https: / / www.nissan-global.com / JP / INNOVATION / TECHNOLOGY / ARCHIVE / E_POWERTRAIN / (e-powertrain, power delivery module, DC / AC inverter) [Non-Patent Document 5] https: / / industrial.panasonic.com / jp / ss / technical / ap5(onboard charger) [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Therefore, the objective is to provide a mobile power supply vehicle that is compact and capable of supplying power at the high discharge rate of the drive battery installed in an electric vehicle. [Means for solving the problem]

[0008] To solve the above problems, the present invention (1) Self-propelled electric vehicles, A connecting cable connected by two contacts to the path between the DC / AC inverter in the electric axle mounted on the electric vehicle and the contactor switch in the battery, and a connecting part having an end at the other end of the connecting cable that can be energized, A mobile power supply vehicle characterized by being composed of [the above]. (2) The mobile power supply vehicle according to (1), characterized in that the connection of the connecting cable to the path is made by drilling a hole in the housing of the electric axle and making the two busbars in the power delivery module the contacts. (3) The mobile power supply vehicle according to (2), characterized in that the location where the hole is made is the top cover of the housing, which is located on the top surface when the hood of the electric vehicle is opened. (4) (1) The mobile power supply vehicle described above, A DC / DC converter connected to the end of the aforementioned connecting portion, The output section is connected to the output side of the DC / DC converter, with the other end connected to an external load. It consists of, A mobile power supply vehicle characterized by supplying DC power to the external load from the output unit. (5) (1) The mobile power supply vehicle described above, A DC / AC inverter connected to the end of the aforementioned connecting portion, The output unit is connected to the output side of the DC / AC inverter, with the other end connected to an external load. It consists of, A mobile power vehicle, characterized in that AC power is supplied from the output unit to the external load. is configured as follows.

Advantages of the Invention

[0009] Since the present invention has the above configuration, the following effects can be obtained. That is, it is possible to provide a compact mobile power vehicle that utilizes the drive battery mounted on an electric vehicle and enables power supply with high dischargeable power possessed by the drive battery. As a result, a mobile power vehicle capable of completely decarbonized rapid charging and power supply can be realized. And since it can move with a regular vehicle license, it has high versatility.

Brief Description of the Drawings

[0010] [Figure 1] It is a conceptual diagram of the mobile power vehicle of the present invention. [Figure 2] It is an explanatory diagram of a method for electrically connecting a connecting portion to a battery. (A) is an electric axle with a cover, and (B) is a schematic diagram of the substrate arrangement of the electric axle when the cover is removed. [Figure 3] It is an explanatory diagram of DC power supply to an electric vehicle using the mobile power vehicle of the present invention. [Figure 4] It is an explanatory diagram of AC power supply to an AC operating device (load) using the mobile power vehicle of the present invention. [Figure 5] It is a schematic diagram of the electric axle of Nissan LEAF (registered trademark). (A) is cited from https: / / ev2.nissan.co.jp / BLOG / 434 / , and (B) is cited from https: / / www.nissan-global.com / JP / INNOVATION / TECHNOLOGY / ARCHIVE / E_POWERTRAIN / . The applicant added reference signs respectively.

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the following examples. [Examples]

[0012] As shown in Figure 1, the mobile power supply vehicle 1 of the present invention consists of a self-propelled electric vehicle 2 and a connecting part 7.

[0013] Electric vehicle 2 can be an electric vehicle already available on the market. Here, we will use the Nissan LEAF (registered trademark), which runs solely on electricity, as an example. The electrical configuration of the Nissan LEAF (registered trademark) is shown in Figure 5. As shown in Figure 5(A), the battery 6 is electrically connected to the electric axle 3 by the third cable 5, supplying electricity to drive the AC motor 3e and propel the electric vehicle 2. In addition, the battery 6 is rapidly charged from the quick charge unit 4 at the charging station.

[0014] The electric axle 3 is a drive unit that replaces the conventional engine and transmission, and is mainly an integrated device combining an AC motor 3e, a reduction gear 3g, and a DC / AC inverter 3a, and is also called e-axle (registered trademark) (Non-Patent Literature 3), or by Nissan as e-powertrain (Non-Patent Literature 4).

[0015] As shown in Figures 1 and 5(B), the electric axle 3 is arranged from top (bonnet side) in the following order: power delivery module 3d, onboard charger 3c, DC / DC converter 3b, DC / AC inverter 3a, and AC motor 3e connected by the first cable 3f. The AC motor 3e's rotational speed is adjusted via a reduction gear 3g, and power is transmitted to the drive system. All of these are existing configurations and technologies.

[0016] A brief overview of these components is as follows: The power delivery module 3d is a module that integrates the power wiring to the DC / DC converter 3b and the onboard charger 3c. The onboard charger 3c, abbreviated as OBC (ON-BOARD CHARGER), converts the voltage (AC) from the charging station to the voltage (DC) required for the battery 6 and is used to charge the battery 6 (Non-Patent Literature 5). The DC / DC converter 3b adjusts the voltage of the battery 6 to the voltage required for the auxiliary battery and outputs it. The DC / AC inverter 3a converts direct current to alternating current during driving to drive the AC motor 3e, and converts alternating current to direct current during deceleration (regeneration) to recover energy (Non-Patent Literature 4).

[0017] The quick charge unit 4 is connected to the power delivery module 3d via a second cable 4b interposed with contactor switches 4c and 4d, and has a port 4a at the other end. Port 4a is equipped with a connection port that allows for rapid charging (80% charge in approximately 30 minutes) using the high-power DC rapid charger of the charging station. Note that the connection path for normal charging using single-phase AC (full charge in approximately 8 hours) is not shown.

[0018] As shown in Figure 1, the connecting section 7 consists of a connecting cable 7b connected by two contacts to the path between the DC / AC inverter 3a in the electric axle 3 mounted on the electric vehicle 2 and the contactor switches 6a and 6b in the battery, and an end 7a at the other end of the connecting cable 7b that can be energized. The contacts in the quick charge section 4 are connected up to the upstream of the contactor switches 4c and 4d.

[0019] This configuration allows the connection section 7 to supply high power (e.g., 35kW to 50kW) to an external load without being limited by communication standards. The end section 7a can be fitted with a plug, outlet, terminal, etc., depending on the connection method to the external load.

[0020] The discharge power from the quick charge unit 4 of a conventional electric vehicle 2 is defined as less than 10kW according to the CHAdeMO communication standard of the Japan CHAdeMO Association, and the equipment is designed accordingly, so it cannot output more than 10kW. Specifically, the discharge output power is limited to less than 10kW by CAN communication between the electric vehicle 2's main computer (VCU) and the load equipment.

[0021] Furthermore, as shown in Figure 2, connecting the connecting cable 7b to the path is preferable because it allows easy access to the path of the electric axle 3, by drilling holes 3k, 3k in the housing 3h of the electric axle 3 and connecting the two busbars in the power delivery module 3d to the first contact 7c and the second contact 7d. Alternatively, the connecting cables 7b may be passed through a single hole 3k.

[0022] Furthermore, if the location for drilling holes 3k, 3k is the top cover 3i of the housing 3h, which is located on the top surface when the hood of the electric vehicle 2 is opened, the connection work for the connecting cable 7b is easier, and access to the route is the easiest.

[0023] The connection of the coupling section 7 is designed to access the high-voltage electrical components inside the electric vehicle 2 in order to extract high-output power exceeding 10kW from the quick-charge section 4 to the battery 6 used to drive the electric vehicle 2. Outputting power in this manner allows the system to be completed at the lowest cost and with the shortest delivery time, and has the advantage of allowing the battery 6 system to be used as is, which was originally designed for the electric vehicle 2.

[0024] Furthermore, the connecting section 7 may be equipped with a circuit breaker (not shown) as needed. If the end 7a is a connector, it is advisable to interrupt the circuit to prevent high voltage from being applied before the end 7a while the electric vehicle 2 is in motion. The circuit breaker will only turn on and supply power to the outside when the electric vehicle 2 is stopped, a load is connected to the end 7a, and power is supplied. In addition, if the circuit breaker is used in the connecting section 7, it is possible to control the circuit so that power is not supplied to the connecting section 7 even during rapid charging using the quick charge section 4. Furthermore, it is advisable to install circuit breakers (not shown) inside the DC / DC converter 8 and DC / AC inverter 11, as described later, as needed, to prevent unnecessary application of voltage when the end is not connected to an external load.

[0025] When supplying power to an external load from the coupling section 7, the ignition of the electric vehicle 2 is turned on, and the contactor switches 6a and 6b of the battery 6 are turned on by starting the electric vehicle 2.

[0026] When performing rapid charging using the conventional quick charge unit 4, the electric vehicle 2 must first be turned off, and the contactor switches 6a and 6b of the battery 6 must be turned off. Then, the rapid charger must be connected to port 4a, and the charging start operation must be performed. This will correctly control and turn on the contactor switches 6a and 6b of the battery 6 and the contactor switches 4c and 4d of the quick charge unit 4, and charging will begin. When charging is complete, each contactor switch will automatically turn off. [Examples]

[0027] As shown in Figure 3, the mobile power supply vehicle 1a of the second embodiment is equipped with a DC / DC converter 8 on the mobile power supply vehicle 1 of the first embodiment, and the end portion 7a of the connecting portion 7 of the first embodiment is connected to the DC / DC converter 8.

[0028] The DC / DC converter 8 includes an output section 8a consisting of an output cable 8b connected to the main body of the DC / DC converter 8 and an end 8c provided at the other end of the output cable 8b. The end 8c has a shape that can be adapted to the external load, for example, a plug. In this case, it is shaped to be connected to the charging port 10 of another electric vehicle 9, and power from the battery 6 of the mobile power supply vehicle 1a is supplied to the external load via the output section 8a.

[0029] The DC / DC converter 8 obtains information about the battery of the electric vehicle 9, which is the external load to be powered, via communication, determines the target DC voltage, and then converts the DC voltage using a step-up / step-down converter. This results in a system that can supply power to a DC battery load in the manner that minimizes power conversion losses. [Examples]

[0030] As shown in Figure 4, the mobile power supply vehicle 1b of the third embodiment is equipped with a DC / AC inverter 11 on the mobile power supply vehicle 1 of Embodiment 1, and the end 7a of the connecting part 7 of Embodiment 1 is connected to the DC / AC inverter 11.

[0031] The DC / AC inverter 11 includes an output section 11a consisting of an output cable 11b connected to the main body of the DC / AC inverter 11 and an end 11c provided at the other end of the output cable 11b. The end 11c has a shape appropriate to the external load, such as a plug, and supplies power from the battery 6 of the mobile power supply vehicle 1a to the external load via the output section 11a. The mobile power supply vehicle 1b can serve as a substitute for AC generators for, for example, household power, elevators, and large construction equipment.

[0032] The DC / AC inverter 11 converts the DC power from the battery 6 into AC power. The AC output includes both three-phase and single-phase AC power. Three-phase AC is mainly used to power equipment that requires a lot of power, such as motors and welding machines. Single-phase AC power can be used to power general electrical appliances such as lighting and heating appliances. The output is taken out via a terminal block for three-phase AC and via a power plug for single-phase AC (terminal 11c). [Explanation of symbols]

[0033] 1 Mobile power supply vehicle 1a Mobile power supply vehicle 1b Mobile power supply vehicle 2 Electric vehicles 3 Electric axle 3A DC / AC Inverter 3b DC / DC converter 3C Onboard Charger 3D Power Delivery Module 3e AC motor 3F First Cable 3g reducer 3h cabinet 3i top lid 3k holes 4. Quick Charge Section 4a Port 4b Second cable 4c Contactor Switch 4d Contactor Switch 5. Third Cable 6 batteries 6a Contactor switch 6b Contactor switch 7 Connecting part 7a End 7b Connecting cable 7c First contact 7d Second contact 8 DC / DC Converters 8a Output section 8b output cable 8c end 9 Electric vehicles 10 charging ports 11 DC / AC Inverter 11a Output section 11b output cable 11c end

Claims

1. Self-propelled electric vehicles, A connecting cable connected by two contacts to the path between the DC / AC inverter in the electric axle mounted on the electric vehicle and the contactor switch in the battery, and a connecting part having an end at the other end of the connecting cable that can be energized, A mobile power supply vehicle characterized by being composed of [the above].

2. The mobile power supply vehicle according to claim 1, characterized in that the connection of the connecting cable to the path is made by drilling a hole in the housing of the electric axle and making the two busbars in the power delivery module the contacts.

3. The mobile power supply vehicle according to claim 2, characterized in that the location where the hole is made is the top cover of the housing, which is located on the top surface when the hood of the electric vehicle is opened.

4. A mobile power supply vehicle according to claim 1, A DC / DC converter connected to the end of the aforementioned connecting portion, The output section is connected to the output side of the DC / DC converter, with the other end connected to an external load. It consists of, A mobile power supply vehicle characterized by supplying DC power to the external load from the output unit.

5. A mobile power supply vehicle according to claim 1, A DC / AC inverter connected to the end of the aforementioned connecting portion, The output unit is connected to the output side of the DC / AC inverter, with the other end connected to an external load. It consists of, A mobile power supply vehicle characterized by supplying AC power to the external load from the output unit.

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