High-voltage power distribution device of pure electric cleaning vehicle

Abstract

The utility model belongs to the technical field of high-voltage power distribution of pure electric sanitation vehicles, and particularly relates to a high-voltage power distribution device of a pure electric cleaning vehicle, which is characterized in that a discharge input anode is connected with a pre-charge contactor K1, a pre-charge resistor R and a fuse FU1; the main contactor K2 and the fuse FU2 are connected with the positive electrodes of the high-pressure water pump motor controller and the low-pressure water pump motor controller, and the discharge input negative electrode is connected with the negative electrodes of the high-pressure water pump motor controller and the low-pressure water pump motor controller to form a loop; the two ends of the pre-charging contactor K1 and the main contactor K2 are connected with voltage sensors. Through the pre-charging loop and the main loop, the pre-charging fault of the high-voltage power distribution device can be effectively prevented under the condition that the voltage of a power system is unstable, an accurate switching interval is provided for the closing link of the pre-charging contactor and the main contactor, and the service life of each contactor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage power distribution for pure electric sanitation vehicles, and in particular relates to a high-voltage power distribution device for a pure electric cleaning vehicle. Background Art

[0002] The pure electric cleaning vehicle is a new type of efficient sanitation equipment for cleaning road garbage and road surfaces. It is mainly used for all-round cleaning of urban roads, residential areas, parks, squares and other roads.

[0003] In order to reduce the failure rate of pure electric sanitation vehicles during use, pre-charging circuits are often used in current high-voltage power distribution systems to reduce input impact current, so that the impact on electrical equipment in the high-voltage power distribution system is reduced to a reasonable range, thereby improving the reliability of electrical equipment on pure electric cleaning vehicles and reducing interference with the high-voltage power distribution system. Although CN215097120U provides a solution for the pre-charging system of fuel cell vehicles, it still has the following technical problems:

[0004] 1. The high and low pressure water pumps in pure electric washing vehicles are used very frequently, and the temperature difference in the outdoor environment is large. The pre-charging system often fails in different temperature and high frequency use environments.

[0005] 2. The electrical equipment in the pure electric washing vehicle also includes oil pumps, fans, air pumps, etc. When the voltage of the power system of the pure electric washing vehicle is unstable, the service life of each contactor in the pre-charging system cannot be effectively guaranteed. Utility Model Content

[0006] The purpose of the utility model is to provide a high-voltage power distribution device for a pure electric washing vehicle in order to solve the above-mentioned problem, which distributes power to the high-voltage electrical system of the whole vehicle, can greatly improve the operating reliability of the whole vehicle, reduce the failure points of the whole vehicle, and lay the foundation for the long-term and stable operation of the whole vehicle.

[0007] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0008] The utility model proposes a high-voltage power distribution device for a pure electric cleaning vehicle, including a central controller, a discharge input positive electrode and a discharge input negative electrode, a high-pressure water pump motor controller, a low-pressure water pump motor controller, a pre-charge contactor K1, a main contactor K2, a pre-charge resistor R, a fuse FU1, and a fuse FU2;

[0009] The positive pole of the discharge input is connected to the pre-charge contactor K1, the pre-charge resistor R, and the fuse FU1, and is connected to the positive poles of the high-pressure water pump motor controller and the low-pressure water pump motor controller through the main contactor K2 and the fuse FU2. The negative pole of the discharge input is connected to the negative poles of the high-pressure water pump motor controller and the low-pressure water pump motor controller to form a loop; both ends of the pre-charge contactor K1 and the main contactor K2 are connected with voltage sensors.

[0010] The central controller is used to receive the opening and closing information of fuse FU1 and fuse FU2 and the voltage information from the voltage sensor.

[0011] As a further optimization solution of the present invention, the high-voltage power distribution device is suitable for a high-voltage power distribution system including a battery module and a user module, and the user module includes a high-pressure water pump and a low-pressure water pump.

[0012] As a further optimization solution of the present utility model, the battery module supplies power to the user module through the discharge input positive electrode and the discharge input negative electrode.

[0013] As a further optimization scheme of the utility model, the high-voltage power distribution system includes a pre-charging signal S1 and a main contactor signal S2. The opening and closing of the pre-charging contactor K1 are controlled by the pre-charging signal S1, and the opening and closing of the main contactor K2 are controlled by the main contactor signal S2.

[0014] As a further optimization scheme of the utility model, the high-voltage power distribution device includes a high-pressure water pump interface arranged on the outer shell and connected to the high-pressure water pump controller, a low-pressure water pump interface connected to the low-pressure water pump controller, and a battery input interface connected to the battery module.

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

[0016] (1) This application is based on the outdoor use environment of pure electric cleaning vehicles. Through the pre-charging circuit and the main circuit, it can effectively prevent the pre-charging failure of the high-voltage distribution device when the power system voltage is unstable, and provide a precise switching range for the closing link of the pre-charging contactor and the main contactor, thereby extending the service life of each contactor.

[0017] (2) The high-voltage power distribution device in the present application can adapt to different high-voltage electrical application scenarios according to the different types of high-voltage electrical equipment in the pure electric cleaning vehicle. At the same time, it can facilitate the maintenance of the high-voltage equipment of the vehicle in the later stage, minimize the fault nodes, and reduce the operating cost of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural schematic diagram of the medium and high voltage power distribution device of the utility model. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example 1

[0021] like Figure 1 As shown, this embodiment proposes a high-voltage power distribution device for a pure electric washing vehicle, including a central controller, a discharge input positive electrode and a discharge input negative electrode, a high-pressure water pump motor controller, a low-pressure water pump motor controller, a pre-charging contactor K1, a main contactor K2, a pre-charging resistor R, a fuse FU1, and a fuse FU2; the discharge input positive electrode is connected to the pre-charging contactor K1, the pre-charging resistor R, and the fuse FU1, and is connected to the positive electrode of the high-pressure water pump motor controller and the low-pressure water pump motor controller through the main contactor K2 and the fuse FU2, and the discharge input negative electrode is connected to the negative electrode of the high-pressure water pump motor controller and the low-pressure water pump motor controller to form a loop; voltage sensors are connected to both ends of the pre-charging contactor K1 and the main contactor K2.

[0022] The central controller is used to receive the opening and closing information of fuse FU1 and fuse FU2 and the voltage information from the voltage sensor.

[0023] Furthermore, the high-voltage power distribution device is suitable for a high-voltage power distribution system including a battery module and a user module. The user module includes a high-pressure water pump and a low-pressure water pump. The battery module supplies power to the user module through the discharge input positive electrode and the discharge input negative electrode. The high-voltage power distribution system includes a pre-charge signal S1 and a main contactor signal S2. The opening and closing of the pre-charge contactor K1 is controlled by the pre-charge signal S1, and the opening and closing of the main contactor K2 is controlled by the main contactor signal S2.

[0024] In this embodiment, the positive pole of the discharge input is connected to one end of the pre-charging contactor K1, the other end of the pre-charging contactor K1 is connected to the pre-charging resistor R, the other end of the pre-charging resistor R is connected to the fuse FU1, the other end of the fuse FU1 is connected to the relevant controller of the user module (high-pressure water pump controller and low-pressure water pump controller), the other end of the controller is connected to the negative pole of the discharge input, and voltage sensors are connected at both ends of the pre-charging contactor K1 to form a pre-charging circuit, which is controlled by the pre-charging signal S1.

[0025] In this embodiment, the positive pole of the discharge input is connected to one end of the main contactor K2, the other end of the main contactor K2 is connected to the relevant controller of the user module through the fuse FU2, and the other end of the relevant controller is connected to the negative pole of the discharge input to form a main circuit; and voltage sensors are connected to both ends of the main contactor K2, and the opening and closing of the main contactor K2 are controlled by the main contactor signal S2.

[0026] It can be understood that the setting of fuse FU1 in the pre-charging circuit and fuse F2 in the main circuit can effectively prevent the failure of pre-charging contactor K1 and main contactor K2 caused by unstable voltage system power during the pre-charging process and the normal power supply of the user module. The rated current of fuses FU1 and FU2 can be selected according to the adaptability of the pre-charging circuit; the setting of voltage sensors at both ends of the pre-charging contactor K1 and the main contactor K2 transmits their voltage information to the central controller, realizing real-time monitoring of voltage detection and connection detection of pre-charging contactor K1 and main contactor K2, providing a basis for safety judgment of the circuit of the high-voltage distribution system, and further simplifying the control circuit structure of the distribution system.

[0027] Furthermore, the high-voltage power distribution device in this embodiment includes a high-pressure water pump interface provided on the outer shell and connected to the high-pressure water pump controller, a low-pressure water pump interface connected to the low-pressure water pump controller, and a battery input interface connected to the battery module.

[0028] It should be noted that, in this embodiment, the voltage sensor may be an actively powered sensor, such as one that works normally with the support of an external DC power supply or an AC power supply of the high voltage power distribution system, and the specific power supply method is not limited in this embodiment.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage power distribution device for a pure electric cleaning vehicle, characterized in that: It includes a central controller, a discharge input positive electrode and a discharge input negative electrode, a high-pressure water pump motor controller, a low-pressure water pump motor controller, a pre-charge contactor K1, a main contactor K2, a pre-charge resistor R, a fuse FU1, and a fuse FU2; The positive pole of the discharge input is connected to the pre-charge contactor K1, the pre-charge resistor R, and the fuse FU1, and is connected to the positive poles of the high-pressure water pump motor controller and the low-pressure water pump motor controller through the main contactor K2 and the fuse FU2. The negative pole of the discharge input is connected to the negative poles of the high-pressure water pump motor controller and the low-pressure water pump motor controller to form a loop; both ends of the pre-charge contactor K1 and the main contactor K2 are connected with voltage sensors. The central controller is used to receive the opening and closing information of fuse FU1 and fuse FU2 and the voltage information from the voltage sensor.

2. A high-voltage power distribution device for a pure electric cleaning vehicle according to claim 1, characterized in that: The high-voltage power distribution device is applicable to a high-voltage power distribution system including a battery module and a user module. The user module includes a high-pressure water pump and a low-pressure water pump.

3. A high-voltage power distribution device for a pure electric cleaning vehicle according to claim 2, characterized in that: The battery module supplies power to the user module through the discharge input positive electrode and the discharge input negative electrode.

4. The high-voltage power distribution device for a pure electric cleaning vehicle according to claim 2, characterized in that: The high-voltage power distribution system includes a pre-charge signal S1 and a main contactor signal S2. The opening and closing of the pre-charge contactor K1 are controlled by the pre-charge signal S1, and the opening and closing of the main contactor K2 are controlled by the main contactor signal S2.

5. The high-voltage power distribution device for a pure electric cleaning vehicle according to claim 2, characterized in that: The high-voltage power distribution device includes a high-pressure water pump interface disposed on an outer shell and connected to a high-pressure water pump controller, a low-pressure water pump interface connected to a low-pressure water pump controller, and a battery input interface connected to a battery module.

Images