Electricity taking system of new energy special vehicle

Abstract

According to the electricity taking system of the new energy special vehicle, a battery pack of the electricity taking system comprises a power source, a heating module, a heating relay, a main loop relay, a battery management unit BMU and a centralized monitoring unit CSU, the output end of a main loop is connected with an automobile chassis high-voltage electric appliance, and the battery pack further comprises an electricity taking port, an electricity taking circuit and an electricity taking port relay. The electricity taking port is a conductive interface arranged outside the battery pack, the electricity taking circuit is respectively connected with the positive electrode and the negative electrode of a power supply, the centralized monitoring unit CSU is connected in series with the electricity taking circuit, the electricity taking port relay is also connected in the electricity taking circuit, and the control end of the electricity taking port relay is connected with the battery management unit BMU. The controller VCU of the new energy special vehicle and the special vehicle mounted control module are respectively connected with the battery management unit BMU through communication lines, the output end of the electricity taking circuit is connected with the electricity taking port, and the output end of the electricity taking port is connected with a special vehicle mounted high-voltage electric appliance. According to the utility model, the energy utilization efficiency of the special vehicle can be improved, and the universality of the power battery is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a power taking system for a new energy special vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, the market share of new energy vehicles is getting higher and higher. Many new energy vehicles are powered by power batteries. However, the power batteries of existing new energy vehicles usually only have a main circuit output to power the high-voltage electrical appliances on the vehicle chassis. The high-voltage electrical appliances installed on new energy special vehicles cannot use the energy of power batteries, resulting in low energy utilization and low versatility of power batteries in new energy vehicles. When using high-voltage electrical appliances installed on the vehicle on new energy special vehicles, it is necessary to provide power for the high-voltage electrical appliances installed on the vehicle separately, which is not only costly but also inconvenient to carry. Summary of the invention

[0003] The purpose of the utility model is to provide a power supply system for a new energy special vehicle in view of the defects of the above-mentioned prior art, so as to improve the energy utilization efficiency of the special vehicle and enhance the versatility of the power battery.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a power supply system for a new energy special vehicle, the battery pack of the power supply system includes a power supply, a heating module, a heating relay, a main circuit relay, a battery management unit BMU, and a centralized monitoring unit CSU. The output end of the main circuit is connected to the high-voltage electrical appliances of the automobile chassis. The battery pack also includes a power supply port, a power supply circuit and a power supply port relay. The power supply port is a conductive interface arranged outside the battery pack. The power supply circuit is respectively connected to the positive and negative poles of the power supply, and the centralized monitoring unit CSU is connected in series to the power supply circuit. The power supply port relay is also connected to the power supply circuit and the control end of the power supply port relay is connected to the battery management unit BMU. The controller VCU of the new energy special vehicle and the control module installed on the special vehicle are respectively connected to the battery management unit BMU through communication lines, and the output end of the power supply circuit is connected to the power supply port.

[0005] A further technical solution of the utility model is that the output end of the power taking port is connected to a high-voltage electrical appliance installed on a special vehicle.

[0006] The utility model discloses a power taking system for a new energy special vehicle, which has the following beneficial effects: the utility model arranges a power taking circuit and a power taking port relay for controlling the current of the power taking circuit in a battery pack, the output end of the power taking circuit is connected to the power taking port, and the automobile controller VCU and the special vehicle mounted control module are respectively connected to the battery management unit BMU through communication lines, and the special vehicle mounted control module processes the input signal to make the power taking port relay energized and can be used for high-voltage power taking on the special vehicle, thereby ensuring the safety and reliability of the vehicle during the power taking process, improving the energy utilization efficiency of the special vehicle, enhancing the versatility of the power battery, facilitating line connection and after-sales repair and inspection, and effectively reducing maintenance costs.

[0007] The power supply system of a new energy special vehicle of the utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a circuit schematic diagram of a power taking system of a new energy special vehicle. DETAILED DESCRIPTION

[0009] like Figure 1 As shown, the utility model is a power supply system for new energy special vehicles. The battery pack of the power supply system includes a power supply, a heating module, a heating relay, a main circuit relay, a battery management unit BMU, and a centralized monitoring unit CSU. The output end of the main circuit is connected to the high-voltage electrical appliances of the vehicle chassis, and the main circuit supplies power to the high-voltage electrical appliances of the vehicle chassis. The line connection relationship of the power supply, heating module, heating relay, main circuit relay, battery management unit BMU, and centralized monitoring unit CSU included in the battery pack are all existing technologies and will not be described in detail here. Please refer to Figure 1 As shown. Among them, the battery management unit BMU is the abbreviation of battery management unit, the centralized monitoring unit CSU is the abbreviation of Central Supervision Unit, and the controller VCU is the abbreviation of Vehicle control unit.

[0010] like Figure 1 As shown, the battery pack also includes a power intake port, a power intake circuit, and a power intake port relay. The power intake port is a conductive interface provided on the outside of the battery pack, through which a high-voltage electrical appliance installed on a special vehicle can be connected. The power intake circuit is connected to the positive and negative poles of the power source respectively, and the centralized monitoring unit CSU is connected in series to the power intake circuit. The power intake port relay is also connected to the power intake circuit, and the control end of the power intake port relay is connected to the battery management unit BMU, and the output end of the power intake circuit is connected to the power intake port. In order to clearly illustrate the power intake circuit, in Figure 1The power-taking circuit is marked in the middle. The power-taking circuit is connected to the positive pole of the power source through points C and A in sequence, and then connected to the positive pole of the power-taking port. The power-taking circuit is connected to the negative pole of the power source through the centralized monitoring unit CSU, point D and point B in sequence, and then connected to the negative pole of the power-taking port. The output end (external end) of the power-taking port is connected to the high-voltage electrical appliances installed on the special vehicle through a conductive wire to provide 320v high-voltage electricity for the high-voltage electrical appliances installed on the vehicle, such as powering motor and electronic control appliances; of course, the 320v high-voltage electricity can also be converted into other numerical voltages through a DC converter to power other power appliances. In order to control the safe and coordinated operation of the power-taking system, the controller VCU of the new energy special vehicle and the control module installed on the special vehicle are respectively connected to the battery management unit BMU through communication lines.

[0011] When working, the controller VCU is responsible for coordinating and managing the entire power-drawing process. The main circuit supplies power to the high-voltage electrical appliances in the vehicle chassis, and the power-drawing port is the interface connecting the vehicle and the upper-mounted high-voltage electrical appliances. As the core of the battery management system, the battery management unit BMU is responsible for monitoring the status of the battery pack, including parameters such as voltage, current, and temperature, as well as overcharge protection functions. When the status of the battery pack reaches the preset safety threshold, the battery management unit BMU will automatically cut off the circuit. Inside the battery pack, the main circuit relay and the power-drawing port relay control the current flow of the main circuit and the power-drawing circuit respectively, and provide the corresponding power supply by respectively closing two independent relays. In view of the fact that existing new energy special-purpose vehicles only have main circuit outputs, this patent application processes the input signal through the special-purpose vehicle upper-mounted control module to close the power-drawing port relay for high-voltage power draw on the special-purpose vehicle, thereby ensuring the safety and reliability of the vehicle during the power-drawing process.

[0012] The above embodiments are only preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply system for a new energy special vehicle, wherein the battery pack of the power supply system includes a power supply, a heating module, a heating relay, a main circuit relay, a battery management unit BMU, and a centralized monitoring unit CSU. The output end of the main circuit is connected to the high-voltage electrical appliances of the vehicle chassis, and is characterized in that: The battery pack also includes a power port, a power circuit and a power port relay. The power port is a conductive interface arranged outside the battery pack. The power circuit is connected to the positive and negative poles of the power supply respectively, and the centralized monitoring unit CSU is connected in series to the power circuit. The power port relay is also connected to the power circuit and the control end of the power port relay is connected to the battery management unit BMU. The controller VCU of the new energy special vehicle and the control module installed on the special vehicle are respectively connected to the battery management unit BMU through communication lines, and the output end of the power circuit is connected to the power port.

2. A power supply system for a new energy special vehicle as claimed in claim 1, characterized in that: The output end of the power taking port is connected to a high-voltage electrical appliance installed on a special vehicle.

Images