Power supply system for new energy engineering machinery and agricultural machinery accessories
By reusing the national standard DC charging interface and CAN communication link of new energy construction machinery, the problems of interface redundancy, poor adaptability and safety risks of attachment power supply system are solved, realizing efficient and safe attachment power supply and improving the energy management and operation continuity of the whole vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN LINGTUO NEW ENERGY TECHNOLOGY PARTNERSHIP (LLP)
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-01
AI Technical Summary
The attachment power supply system of new energy construction machinery has problems such as interface redundancy, poor adaptability, safety risks and insufficient data interaction, resulting in complex vehicle wiring, high cost, major safety hazards and low energy management efficiency.
The vehicle's original national standard DC charging interface is used as the power input interface for the attachments. The attachment type is identified and real-time data interaction is achieved through identification resistors and CAN communication links. Combined with electronic locks and temperature sensors, safe and reliable power supply is ensured, forming a technical closed loop.
It enables interface reuse, reduces wiring complexity and cost, improves attachment compatibility and safety, optimizes energy management, and enhances operational continuity and energy utilization.
Smart Images
Figure CN224184121U_ABST
Abstract
Description
A power supply system for new energy engineering machinery and agricultural machinery attachments Technical Field
[0001] This utility model relates to a power supply system for new energy engineering machinery and agricultural machinery attachments, belonging to the technical field of new energy power supply devices. Background Technology
[0002] With the advancement of "dual-carbon" goals, the electrification transformation of new energy construction machinery / agricultural machinery (such as pure electric tractors and electric loaders) is accelerating. Attachments of traditional fuel-powered machinery (such as rotary tillers and seeders) are typically driven by an engine through hydraulic or mechanical transmission, resulting in high emissions, low energy conversion efficiency, and high maintenance costs. New energy machinery requires independent power supply systems for its attachments, and existing technologies mainly suffer from the following pain points:
[0003] Firstly, redundant power supply interfaces: The charging interfaces (such as the national standard DC charging port) of traditional electric machinery are set up independently from the power supply interfaces of attachments, which requires the vehicle to reserve additional electrical interface positions, increasing the complexity of vehicle wiring and manufacturing costs.
[0004] Secondly, poor compatibility of attachments: The power requirements of different types of attachments (such as high-power rotary tillers and low-power seeders) vary greatly. The existing system lacks a mechanism to identify attachment types, which can easily lead to over-discharge of batteries or undervoltage of attachments due to power mismatch.
[0005] Third, there are significant safety risks: when the power input interface and charging interface are separated, users may accidentally plug or unplug the device while it is powered on, causing an electric arc or short circuit; and there is a lack of real-time monitoring and power-off protection when the interface temperature is abnormal, which poses a risk of thermal runaway.
[0006] Fourth, data interaction is lacking: the operating status of the attachments (such as motor speed and fault information) and the vehicle control (such as battery remaining power and power distribution) are not linked in real time, resulting in low energy management efficiency and affecting the continuity of operations.
[0007] To address the aforementioned issues, a shared power supply system based on the national standard DC charging interface has become an urgent need. Summary of the Invention
[0008] The purpose of this utility model is to propose a power supply system for new energy engineering machinery and agricultural machinery attachments. By reusing the original charging interface of the vehicle, the attachments can draw power, which solves the problems of interface redundancy, poor compatibility, safety risks and insufficient data interaction.
[0009] The present invention discloses a power supply system for new energy engineering machinery and agricultural machinery attachments, comprising: a vehicle-end DC charging interface and an attachment-end power take-off plug; the vehicle-end DC charging interface is the original national standard DC charging interface of new energy engineering machinery / agricultural machinery, the attachment-end power take-off plug is electrically connected to the vehicle's high-voltage battery pack through the vehicle-end DC charging interface, and the attachment end is connected to the vehicle-end DC charging interface for power take-off through a cable with the attachment-end power take-off plug, so that the attachment and the vehicle share the same electrical interface for power take-off and vehicle charging when working.
[0010] Preferably, the power plug at the attachment end adopts the same national standard fast charging plug as the DC charging pile, and the DC charging interface at the vehicle end is a DC charging socket conforming to the GB / T 20234.3-2015 standard.
[0011] Preferably, the attachment power plug is provided with an identification resistor R3, the resistance value of which is configured according to the type of attachment.
[0012] Preferably, the DC charging interface on the vehicle side and the power supply plug on the attachment side are connected via "S+" and "S-" communication lines to form a CAN communication link. The vehicle side is equipped with a vehicle controller, and the attachment side is equipped with a superstructure motor controller. The vehicle controller and the superstructure motor controller achieve real-time data interaction through the CAN communication link, and the identification resistor R3 is connected to the vehicle controller.
[0013] Preferably, the DC charging interface on the vehicle end has a built-in electronic lock, which is electrically connected to the upper-mount motor controller on the attachment end. The upper-mount motor controller controls the locking or unlocking to ensure that the interface is not energized when plugged in or unplugged.
[0014] Preferably, the DC charging interface on the vehicle side has a built-in temperature sensor, which is electrically connected to the vehicle controller to monitor the temperature of the DC charging interface on the vehicle side and feed it back to the vehicle controller to trigger power-off protection.
[0015] Preferably, the vehicle controller is electrically connected to high-voltage relays K5 and K6, which are located in the circuit between the vehicle's high-voltage battery pack and the power supply plug at the attachment end.
[0016] Preferably, the new energy engineering machinery / agricultural machinery includes, but is not limited to, pure electric tractors, electric harvesters or electric loaders; the attachments include, but are not limited to, electric rotary tillers, seeders or spreaders.
[0017] The power supply system for new energy engineering machinery and agricultural machinery attachments described in this utility model has the following beneficial effects:
[0018] 1. Interface reuse reduces costs and increases efficiency.
[0019] The innovative reuse of the vehicle's original DC charging interface as the attachment power interface eliminates the design, installation, and wiring costs of independent attachment interfaces, reduces the number of interfaces in the whole vehicle, lowers wiring complexity, and saves physical space at the front / side of the vehicle, leaving more design margin for other functional modules.
[0020] 2. Intelligent recognition, universally applicable
[0021] The attachment power plug has a built-in differential identification resistor (e.g., 2000Ω for rotary tillers, 1500Ω for seeders). The vehicle controller automatically matches the attachment type and power requirements by detecting the voltage at the detection point (e.g., 8V). No manual parameter setting is required. It supports plug-and-play use of multiple types of attachments (rotary tillers, seeders, weeders, etc.) in the range of 3-15kW, improving the attachment compatibility success rate.
[0022] 3. Multiple layers of protection ensure safety and reliability.
[0023] Electronic lock linkage control: The electronic lock will automatically unlock and allow insertion and removal only when the vehicle controller confirms that the attachment is matched and there is no high voltage. This completely eliminates the risk of arcing and short circuit caused by live insertion and removal.
[0024] Real-time temperature monitoring: The interface has a built-in temperature sensor. When the temperature exceeds the threshold, the high-voltage relay (K5 / K6) will immediately disconnect to prevent insulation aging or thermal runaway caused by overheating of the interface.
[0025] 4. Data interconnection and efficient collaboration
[0026] The motor controller on the attachment end and the vehicle controller establish a CAN communication link through the "S+" and "S-" communication lines (compliant with GB / T 27930 standard) to exchange attachment operating status (motor speed, torque, fault codes) and vehicle parameters (battery SOC, available power, temperature) in real time. It supports dynamic adjustment of attachment output power, improves energy utilization, and reduces work interruption rate.
[0027] In summary, through interface reuse and intelligent design, a technological closed loop is formed in terms of reducing costs, improving adaptability, enhancing safety, and optimizing energy management, providing a highly reliable and compatible solution for power supply of attachments in new energy construction machinery / agricultural machinery. Attached Figure Description
[0028] Figure 1: Power supply schematic diagram of this utility model when no attachment is connected;
[0029] Figure 2: Power supply schematic diagram when connecting attachments in this utility model;
[0030] Figure 3: Schematic diagram of the vehicle-side DC charging interface and the attachment-side power plug in this utility model;
[0031] Figure 4: Schematic diagram of the terminals of the DC charging interface on the vehicle side in this utility model;
[0032] Figure 5: Schematic diagram of the terminals of the power supply plug in this utility model;
[0033] In the diagram: 1. DC charging interface on the vehicle side; 2. Power plug on the attachment side. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0035] Example 1:
[0036] As shown in Figures 1-5, the power supply system for new energy engineering machinery and agricultural machinery attachments of this utility model includes: a vehicle-end DC charging interface 1 and an attachment-end power take-off plug 2; the vehicle-end DC charging interface 1 is the original national standard DC charging interface for new energy engineering machinery / agricultural machinery, the attachment-end power take-off plug 2 is electrically connected to the vehicle's high-voltage battery pack through the vehicle-end DC charging interface 1, and the attachment end is connected to the vehicle-end DC charging interface 1 for power take-off through a cable with the attachment-end power take-off plug 2, so that the attachment and the vehicle share the same electrical interface when working.
[0037] The attachment-side power plug 2 uses the same national standard fast charging plug as the DC charging pile, and the vehicle-side DC charging interface 1 conforms to the GB / T 20234.3 standard.
[0038] The attachment power plug 2 is equipped with an identification resistor R3, the value of which is configured according to the type of attachment.
[0039] The DC charging interface 1 on the vehicle side and the power plug 2 on the attachment side are connected by "S+" and "S-" communication lines to form a CAN communication link.
[0040] The vehicle is equipped with a vehicle controller, and the attachment is equipped with a superstructure motor controller. The vehicle controller and the superstructure motor controller achieve real-time data interaction through the CAN communication link. The identification resistor R3 is connected to the vehicle controller.
[0041] The vehicle-side DC charging interface 1 has a built-in electronic lock. The electronic lock is electrically connected to the attachment-side upper motor controller, which controls the locking or unlocking to ensure that the interface is not energized when plugged in or unplugged.
[0042] The vehicle-side DC charging interface 1 has a built-in temperature sensor, which is electrically connected to the vehicle controller. The temperature sensor is used to monitor the temperature of the vehicle-side DC charging interface 1 and feed it back to the vehicle controller to trigger power-off protection.
[0043] The vehicle controller is electrically connected to high-voltage relays K5 and K6, which are located in the circuit between the vehicle's high-voltage battery pack and the attachment power connector 2.
[0044] This embodiment uses a pure electric tractor (rated voltage 540V, battery capacity 280Ah) as the application platform, and is compatible with two typical attachments: a rotary tiller (rated power 8kW) and a seeder (rated power 4kW). The specific implementation method is as follows:
[0045] When the tractor is not equipped with a rotary tiller, the DC charging interface is used as the charging interface according to GB / T 20234. The connection diagram is shown in Figure 1. After the charging cable is connected to the vehicle, the vehicle communicates and hands-on with the charging pile according to the requirements of GB / T 27930 to start charging the vehicle.
[0046] According to national standards, resistor R3 has a resistance of 1000Ω and is used to determine if the charging gun is properly connected to the vehicle.
[0047] When the vehicle controller measures the voltage at "Detection Point 2" to be 5V, it indicates that the DC charging port is connected to a DC charging pile and the vehicle is running the charging program.
[0048] When the tractor is equipped with a rotary tiller, the resistance value of resistor R3 is changed to indicate different attachment types. For example, the resistance value of R3 is 2000Ω for an electric rotary tiller. The connection principle between the rotary tiller and the vehicle is shown in Figure 2: When the attachment's power cable is plugged into the vehicle's DC charging port, the vehicle controller measures a voltage of 8V at "detection point 2," indicating that the DC charging port is connected to the electric rotary tiller, and the vehicle is running the attachment's driver program.
[0049] The vehicle controller establishes CAN communication with the superstructure motor controller on the attachment via "S+" and "S-".
[0050] The following is a detailed explanation based on Figures 1 and 2:
[0051] The vehicle-side DC charging interface uses a DC charging socket that conforms to the GB / T 20234.3-2015 standard;
[0052] The detection resistor R3 (2000Ω for rotary tiller scenario, 1500Ω for seeder scenario) is connected to the vehicle controller via CC2 to form a voltage divider circuit for the vehicle controller to identify the attachment type.
[0053] The temperature sensor (model DS18B20, measurement range -40℃~125℃, accuracy ±2℃) is closely attached to the DC+ terminal of the DC charging interface 1 on the vehicle side (a high current point prone to heat generation).
[0054] Electronic lock (electromagnetic type, unlocking current 12V / 1A);
[0055] Attachment power connector: A DC charging connector that is physically matched with the DC charging interface on the vehicle side.
[0056] Vehicle controller (VCU, model VECU-300): integrates a voltage detection module (detection point 2, range 0-15V, accuracy ±0.1V), a CAN communication module (compliant with ISO 11898-2 standard) and a safety control unit (including high voltage relays K5 / K6, breaking capacity 600V / 200A).
[0057] High-voltage battery pack: Lithium iron phosphate battery pack, supporting a maximum discharge current of 200A, connected to the vehicle's DC charging interface 1 via "DC+" and "DC-" high-voltage lines;
[0058] Communication link: CAN communication is established through the "S+" and "S-" lines to realize data interaction between the vehicle controller and the superstructure motor controller.
[0059] As shown in Figures 4 and 5, the vehicle-side DC charging interface 1 (compliant with GB / T 20234.3-2015, including terminals: DC+, DC-, S+, S-, A+, A-, CC1, CC2, PE) and the attachment-side power connector 2 are physically matched with the vehicle-side DC charging interface 1, with each terminal corresponding to the other. Utilizing the vehicle's built-in DC charging interface to power the attachments improves interface utilization efficiency. No additional power connectors are required, reducing overall vehicle cost.
[0060] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A power supply system for new energy engineering machinery and agricultural machinery attachments, characterized in that, include: The vehicle-side DC charging interface (1) and the attachment-side power plug (2) are provided. The vehicle-side DC charging interface (1) is the original national standard DC charging interface for new energy engineering machinery / agricultural machinery. The attachment-side power plug (2) is electrically connected to the vehicle's high-voltage battery pack through the vehicle-side DC charging interface (1). The attachment end is connected to the vehicle-side DC charging interface (1) for power through a cable with the attachment-side power plug (2), so that the attachment and the vehicle share the same electrical interface when the attachment is working.
2. A power supply system for new energy engineering machinery and agricultural implement according to claim 1, characterized in that, The attachment-side power plug (2) uses the same national standard fast charging plug as the DC charging pile, and the vehicle-side DC charging interface (1) is a DC charging socket.
3. The power supply system for new energy engineering machinery and agricultural machinery attachments according to claim 1, characterized in that, The attachment power plug (2) is equipped with an identification resistor R3, the resistance value of which is configured according to the type of attachment.
4. The power supply system for new energy engineering machinery and agricultural machinery attachments according to claim 3, characterized in that, The vehicle-side DC charging interface (1) and the accessory-side power plug (2) are connected via "S+" and "S-" communication lines to form a CAN communication link.
5. A power supply system for new energy engineering machinery and agricultural implement according to claim 4, characterized in that, The vehicle end is equipped with a vehicle controller, and the attachment end is equipped with a superstructure motor controller. The vehicle controller and the superstructure motor controller achieve real-time data interaction through the CAN communication link, and the identification resistor R3 is connected to the vehicle controller.
6. A power supply system for new energy engineering machinery and agricultural implement according to claim 5, characterized in that, The vehicle-side DC charging interface (1) has a built-in electronic lock. The electronic lock is electrically connected to the attachment-side motor controller and is controlled by the attachment motor controller to lock or unlock, ensuring that the interface is not energized when plugged in or unplugged.
7. The power supply system for new energy engineering machinery and agricultural machinery attachments according to claim 5, characterized in that, The vehicle-side DC charging interface (1) has a built-in temperature sensor, which is electrically connected to the vehicle controller and is used to monitor the temperature of the vehicle-side DC charging interface (1) and feed it back to the vehicle controller to trigger power-off protection.
8. The power supply system for new energy engineering machinery and agricultural machinery attachments according to claim 5, characterized in that, The vehicle controller is electrically connected to high-voltage relays K5 and K6, which are located on the circuit between the vehicle's high-voltage battery pack and the attachment power connector (2).
9. The power supply system for new energy engineering machinery and agricultural machinery attachments according to claim 1, characterized in that, The new energy engineering machinery / agricultural machinery mentioned above includes pure electric tractors, electric harvesters, or electric loaders; the attachments mentioned above include electric rotary tillers, seeders, or spreaders.