Range-extending vehicle and high-voltage power distribution system thereof

Abstract

The utility model relates to a range-extending vehicle and a high-voltage power distribution system thereof, and belongs to the technical field of range-extending vehicles. The system comprises a range extender, a range extender controller, a motor controller and a battery high-voltage distribution box with a charging interface, the range extender is connected with the input end of the range extender controller through a three-phase high-voltage cable, and the motor controller is provided with at least two direct-current ports. The two direct current ports are respectively connected with respective output ends of the range extender controller and the battery high-voltage distribution box, positive electrodes of the two direct current ports are connected, negative electrodes of the two direct current ports are connected, and the charging interface is used for being externally connected with charging equipment. According to the utility model, the ports of the motor controller and the battery high-voltage distribution box are redistributed, the two direct-current ports are respectively connected with the respective output ends of the battery high-voltage distribution box and the battery high-voltage distribution box, and the anodes of the two direct-current ports are connected and the cathodes of the two direct-current ports are connected, so that the range extender can charge the power battery and can also charge the power battery; and external charging of the power battery can be realized through external charging equipment of the charging interface.

Description

Technical Field

[0001] This utility model relates to a range-extended vehicle and its high-voltage power distribution system, belonging to the field of range-extended vehicle technology. Background Technology

[0002] New energy mining trucks are a type of engineering machinery that is currently widely used in mining areas, especially pure electric mining trucks, which have been widely promoted and applied. However, due to the large load capacity of mining trucks, the requirements for the power system are high, so the power system of pure electric mining trucks generally adopts a dual-motor solution.

[0003] Range-extended mining trucks are a type of mining truck developed for heavy-duty, long-distance transportation scenarios. Their power system is generally based on a pure electric mining truck power system with the addition of a range extender. The pure electric mining truck power system can achieve external charging of the power battery through its high-voltage distribution box charging circuit. Conventional range extender charging schemes typically utilize the range extender controller connected to the battery's high-voltage distribution box charging circuit to charge the power battery. However, because the battery's high-voltage distribution box charging circuit is occupied by the range extender controller's charging circuit, the external battery charging function cannot be realized. When the vehicle's range extender malfunctions or the battery requires equalization maintenance, external charging cannot replenish the battery, thus affecting the vehicle's normal operation.

[0004] Among them, the battery high-voltage distribution box, as one of the necessary paths for power energy transfer during the charging and discharging of the power battery, has a limited number of wiring ports. Taking a battery high-voltage distribution box with four wiring ports as an example, one port connects to the power battery, another is used to connect to an external charger or to the output terminal of the range extender controller, and the remaining two are connected to the DC ports of the two motor controllers respectively. Applying such a battery high-voltage distribution box to the high-voltage power distribution system of a range extender vehicle, such as... Figure 1 As shown, the wiring ports of the battery high-voltage distribution box are connected to the output terminal of the range extender controller. The engine drives the range extender, which outputs three-phase AC power. The range extender is connected to the input terminal of the range extender controller via a three-phase high-voltage cable, transmitting the three-phase AC power output from the range extender to the range extender controller. The range extender controller rectifies the AC power and outputs DC power through its output terminal. The electrical energy output by the range extender controller is then transferred to the power battery through the battery high-voltage distribution box, enabling the range extender to charge the power battery. However, due to the limited number of wiring ports in the battery high-voltage distribution box, this high-voltage power distribution system cannot recharge the power battery via an external charger when the range extender controller is connected to the battery high-voltage distribution box. Utility Model Content

[0005] The purpose of this utility model is to provide a high-voltage power distribution system for a range-extended vehicle, which solves the problem that the charging circuit of the battery high-voltage distribution box is occupied by the charging circuit of the range extender controller in the high-voltage power distribution system, resulting in the inability to connect external charging to replenish the battery; and also provides a range-extended vehicle, which solves the problem that the charging circuit of the battery high-voltage distribution box is occupied by the charging circuit of the range extender controller in the high-voltage power distribution system of the range-extended vehicle, resulting in the inability to connect external charging to replenish the battery.

[0006] To achieve the above objectives, the solution of this utility model includes:

[0007] This utility model discloses a high-voltage power distribution system for a range-extended vehicle, comprising a range extender, a range extender controller, a motor controller for controlling the drive motor, and a battery high-voltage power distribution box with a charging interface. The range extender is connected to the input terminal of the range extender controller via a three-phase high-voltage cable. The motor controller has at least two DC ports, which are respectively connected to the output terminals of the range extender controller and the battery high-voltage power distribution box. The positive terminals of the two DC ports are connected to each other, and the negative terminals are connected to each other. The charging interface is used to connect an external charging device.

[0008] Furthermore, the number of motor controllers is the same as the number of drive motors, with one motor controller controlling one drive motor.

[0009] Furthermore, the number of motor controllers and the number of drive motors are both 2.

[0010] This utility model discloses a range-extended vehicle, including a high-voltage power distribution system. The high-voltage power distribution system includes a range extender, a range extender controller, a motor controller for controlling the drive motor, and a battery high-voltage power distribution box with a charging interface. The range extender is connected to the input terminal of the range extender controller via a three-phase high-voltage cable. The motor controller has at least two DC ports, which are respectively connected to the output terminals of the range extender controller and the battery high-voltage power distribution box. The positive terminals of the two DC ports are connected to each other, and the negative terminals are connected to each other. The charging interface is used to connect an external charging device.

[0011] Furthermore, the number of motor controllers is the same as the number of drive motors, with one motor controller controlling one drive motor.

[0012] Furthermore, the number of motor controllers and the number of drive motors are both 2.

[0013] Furthermore, the range-extended vehicle has a charging gun interface for plugging in the charging gun, which is connected to the charging interface.

[0014] Furthermore, the number of charging gun interfaces is 2.

[0015] The beneficial effects of this utility model are:

[0016] This utility model is an improved invention, providing a high-voltage power distribution system for range-extended vehicles. Based on the existing high-voltage power distribution system, the ports of the motor controller and the battery high-voltage power distribution box are redistributed. The two DC ports of the motor controller are respectively connected to the output terminal of the battery high-voltage power distribution box and the output terminal of the range extender controller, and the positive terminals of the two DC ports are connected to each other and the negative terminals are connected to each other. This enables the range extender to charge the power battery, and also enables external charging of the power battery through the charging equipment connected to the charging interface of the battery high-voltage power distribution box, meeting the needs of range-extended vehicles for external charging and power battery replenishment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the high-voltage power distribution system of an existing range-extended vehicle;

[0018] Figure 2 This is a schematic diagram of the high-voltage power distribution system for the range-extended vehicle provided by this utility model. Detailed Implementation

[0019] To address the problems in the background technology, this utility model provides a high-voltage power distribution system for range-extended vehicles. Without changing the original number of wiring ports in the battery high-voltage distribution box, it utilizes the DC port of the motor controller and the equipotential effect to allow the range extender controller's charging circuit to no longer occupy the battery high-voltage distribution box's charging circuit, thus enabling the range extender to charge the power battery. By allowing an external charging device to be connected to the wiring ports of the battery high-voltage distribution box originally connected to the range extender controller, the problem of being unable to externally charge the battery due to the range extender controller's charging circuit occupying the battery high-voltage distribution box's charging circuit in the high-voltage power distribution system is solved. The wiring ports of the battery high-voltage distribution box used for connecting external charging devices serve as charging interfaces.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] An example of a range-extended vehicle:

[0022] A range-extended vehicle, including a high-voltage power distribution system for the range-extended vehicle.

[0023] One type of high-voltage power distribution system for a range-extended vehicle includes a range extender for connecting to an external engine, a range extender controller for rectification, a motor controller for controlling a drive motor and having at least two DC ports, and a battery high-voltage distribution box for connecting to a power battery and having a charging interface. The range extender is connected to the input terminal of the range extender controller via a three-phase high-voltage cable. The charging interface is for connecting an external charging device. The two DC ports are respectively connected to the output terminals of the range extender controller and the battery high-voltage distribution box. The positive terminals of the two DC ports are connected to each other, and the negative terminals are connected to each other, so that the voltage at the two DC ports is equal, allowing electrical energy to be distributed at this location. The wiring port connecting the battery high-voltage distribution box to the power battery serves as the input terminal of the battery high-voltage distribution box. The naming of the input and output of the motor controller and the battery high-voltage distribution box depends on the energy transmission path when driving the drive motor.

[0024] The charging conditions of the power battery include charging the power battery by the range extender, charging the power battery by the charging equipment, and charging the power battery by the energy recovered by the vehicle's braking.

[0025] The process of the range extender charging the power battery is as follows: The engine drives the range extender, which outputs three-phase AC power. The range extender is connected to the input terminal of the range extender controller through a three-phase high-voltage cable. The three-phase AC power output by the range extender is transmitted to the range extender controller through the three-phase high-voltage cable. After rectification, the range extender controller outputs DC power through its output terminal. The electrical energy output by the range extender controller is transmitted to the power battery in sequence through the motor controller and the battery high-voltage distribution box, thereby realizing the range extender charging the power battery.

[0026] The charging process of the charging equipment to charge the power battery is as follows: The charging equipment outputs DC power, and the output electrical energy is transmitted to the power battery through the battery high-voltage distribution box, so as to realize the charging equipment to charge the power battery.

[0027] The process of recovering energy from vehicle braking to charge the power battery is as follows: the three-phase AC power output by the drive motor connected to the motor controller is inverted by the motor controller, and the motor controller transfers the power energy to the power battery through the DC port connected to the battery high-voltage distribution box, thereby realizing the recovery of energy from vehicle braking to charge the power battery.

[0028] Specifically, the number of motor controllers is the same as the number of drive motors, with one motor controller controlling one drive motor to achieve individual control of the drive motor.

[0029] In other implementations, the number of motor controllers differs from the number of drive motors. One motor controller can control two or three drive motors to achieve centralized and unified control of the drive motors. Alternatively, two motor controllers can control the same drive motor, in which case the two motor controllers can serve as backups for each other.

[0030] Specifically, one motor controller controls one drive motor. The number of motor controllers is the same as the number of drive motors, and both are two, so as to realize the individual control of the two drive motors. Such a high-voltage power distribution system can be applied to dual-motor range-extended mining cars.

[0031] As another implementation, one motor controller controls one drive motor. The number of motor controllers is the same as the number of drive motors, and both are 1, so as to realize the individual control of one drive motor. Such a high-voltage power distribution system can be applied to single-motor range-extended vehicles.

[0032] Specifically, the range-extended vehicle has a charging gun interface for plugging in the charging gun, and a charging interface for connecting external charging equipment connects to the charging gun interface. When there is one charging gun interface, single-gun charging of the power battery is possible. When there are two charging gun interfaces, dual-gun charging of the power battery is possible, accelerating the external charging speed. Naturally, the more charging gun interfaces, the faster the charging speed. A suitable high-voltage battery distribution box can be selected according to actual needs to meet the power battery's charging requirements. Existing chargers are used for charging.

[0033] As a typical implementation method, a high-voltage power distribution system for a range-extended vehicle, such as Figure 2 As shown, it mainly includes a range extender, a range extender controller, two motor controllers, and two drive motors. Figure 2 The system consists of a motor, a battery high-voltage distribution box, and a charging socket. Utilizing the two input characteristics of the motor controller and the two output characteristics of the battery high-voltage distribution box, and through the equipotential effect at the two DC ports of the motor controller, it achieves high-voltage power transmission for the entire vehicle while simultaneously connecting the charging socket via the charging circuit of the battery high-voltage distribution box to meet the charging requirements of the power battery plug-in.

[0034] The input of the range extender is connected to the engine through a mechanical transmission mechanism. When the engine runs, it drives the range extender to generate electricity through the mechanical transmission mechanism. The output of the range extender is three-phase AC power.

[0035] The input terminal of the range extender controller is connected to the output terminal of the range extender via a three-phase high-voltage cable (U, V, W). The input terminal of the range extender controller is used to receive the three-phase AC power generated by the range extender. The output terminal of the range extender controller is connected to two motor controllers via two high-voltage cables. Its function is to convert the AC power generated by the range extender into DC power through the rectifier circuit of the range extender controller. The converted DC power can meet the needs of the motor controllers and charge the power battery.

[0036] The range extender controller has two outputs connected to two motor controllers respectively; there are two motor controllers and two motors, and one motor controller has two inputs through its two DC ports; the battery high-voltage distribution box contains two, three or more output ports, one input port and one charging interface. The input port, output port and charging interface are all wiring ports of the battery high-voltage distribution box. This solution uses one input port, two output ports and one charging interface. The charging interface is used to connect to the charging socket for an external charger. The two output ports of the battery high-voltage distribution box are used to connect to the two motor controllers respectively, and the input port of the battery high-voltage distribution box is used to connect to the power battery.

[0037] Each motor controller contains two inputs. The positive and negative terminals of the two inputs are connected internally within the motor controller. One input is connected to the output of the range extender controller, and the other input is connected to the output of the battery high-voltage distribution box, thereby realizing the electrical connection between the range extender controller and the battery high-voltage distribution box.

[0038] The output of the motor controller is connected to the drive motor via a three-phase high-voltage cable (U, V, W). When the drive motor drives the vehicle, the inverter circuit inside the motor controller converts DC power into AC power to drive the motor. When the vehicle brakes, the internal rectifier circuit converts AC power back into DC power to recover the generated electrical energy.

[0039] The two outputs of the battery high-voltage distribution box are connected to the input terminals of two motor controllers respectively. The input terminal of the battery high-voltage distribution box is connected to the power battery. At the same time, the charging interface of the battery high-voltage distribution box can be used to connect to an external charging socket. When the battery needs to be charged externally, it can be connected to a charger through the charging socket to enable the charger to charge the power battery.

[0040] The motor controller receives DC power from the range extender controller and DC power from the power battery via the battery high-voltage distribution box. This DC power is then used by the drive motor via the motor controller's inverter circuit. Simultaneously, it receives energy recovered during braking by the vehicle's drive motor and converts AC power into DC power via a rectifier circuit to recharge the power battery. The battery high-voltage distribution box connects the motor controller, power battery, and charging socket via high-voltage cables. Utilizing the motor controller's dual-input function and the equipotential effect of the dual inputs, the range extender controller and power battery are electrically connected. Additionally, the charging port remaining in the battery high-voltage distribution box can be used to connect an external charging socket to replenish the battery.

[0041] Among them, the range extender, drive motor and charger can all serve as power sources to provide energy to the power battery, and the power battery can also serve as a power source to provide energy to the drive motor.

[0042] An embodiment of a high-voltage power distribution system for a range-extended vehicle:

[0043] A high-voltage power distribution system for a range-extended vehicle has been described in detail in one embodiment of the range-extended vehicle, and will not be repeated here.

Claims

1. A high-voltage power distribution system of a range-extender vehicle, comprising a range extender, a range extender controller, a motor controller for controlling a driving motor connected thereto, and a battery high-voltage distribution box having a charging interface, the range extender being connected to an input of the range extender controller through a three-phase high-voltage cable, characterized in that, The motor controller has at least two DC ports, two of which are respectively connected to the output terminals of the range extender controller and the battery high-voltage distribution box, and the positive poles of the two DC ports are connected to each other and the negative poles are connected to each other, and the charging interface is used for external charging equipment.

2. The high voltage power distribution system of the extended-range vehicle according to claim 1, wherein, The number of motor controllers is the same as the number of driving motors, and one motor controller is connected to one driving motor.

3. The high voltage power distribution system of the extended-range vehicle according to claim 2, wherein, The number of motor controllers and the number of driving motors are both 2.

4. A range extender vehicle comprising a high-voltage power distribution system, the high-voltage power distribution system comprising a range extender, a range extender controller, a motor controller for controlling a connection to a drive motor, and a battery high-voltage distribution box having a charging interface, the range extender being connected to an input of the range extender controller by a three-phase high-voltage cable, characterized in that, The motor controller has at least two DC ports, two of which are respectively connected to the output terminals of the range extender controller and the battery high-voltage distribution box, and the positive poles of the two DC ports are connected to each other and the negative poles are connected to each other, and the charging interface is used for external charging equipment.

5. The range extended vehicle of claim 4, wherein, The number of motor controllers is the same as the number of driving motors, and one motor controller is connected to one driving motor.

6. The extended-range vehicle of claim 5, wherein, The number of motor controllers and the number of driving motors are both 2.

7. The extended-range vehicle of any one of claims 4 to 6, wherein, The range extender vehicle has a charging gun interface for inserting a charging gun, and the charging gun interface is connected to the charging interface.

8. The range extended vehicle of claim 7, wherein, The number of charging gun interfaces is 2.

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